"Transfer" usually implies title/ownership. Storing something somewhere does not imply ownership changes.
I can't speak to CT laws and I had no use for Lowell Weicker when I did live in CT many years ago.
I've started the follow-up post a few times, to finish my thoughts because this is a really complex topic. I agree with you that the term transfer does typically suggest a change in title/ownership, like you suggest. However, what concerns me is that there is the language in Connecticut's transfer laws.
Beyond the law, the other part that concerns me is practical interpretation by authorities. About 5 years ago, there was a case in my town involving a police response to a medical call which resulted in observation of several firearms (a shotgun, one or more handguns, and one or more banned assault weapons). The weapons were not secured (i.e. were accessible to the resident). A resident (there may have been multiple) of the location where the weapons were found claimed that the weapons belonged to a relative who left them there for temporary storage during anticipated medical treatment. The relative corroborated the statement and was later arrested by warrant for charges related to unlawfully transferring the pistol and the assault weapon. (At the time, private long gun transfers did not require documentation/authorization). [The shotgun was loaded, infer from that what you may] Charges were later dismissed, I believe through a diversionary program. Additionally there have also been instances in which police officers have given people a hard time about guns that don't come back on the state police database (one of the Hartford Walmart open carry videos is a good
exemplum). I can also think of a BFPE hearing in which they too tried to make issue of a gun showing as "registered" to another permit holder (who was present at the time of the incident) but carried by an appellant (who claimed to have purchased the gun with proper procedure). [There are well known flaws with respect to SLFU's maintenance of the "registry", at least in the past.]
I previously mentioned 29-33(b) which covers the prohibition on "purchasing" a pistol without appropriate credentials. It is also important to consider other subsections (e.g. 29-33(c)-(e)) which cover the process that the transferor must follow. Those requirements are premised on the actions of "sell, deliver, or otherwise transfer." There are couple of exemptions to various transfer requirements which are explicit for temporary transfers (i.e. 29-34(b) related to temporary transfers for immediately supervised range shooting).
(b) No person shall sell, barter, hire, lend, give, deliver or otherwise transfer to any person under the age of twenty-one years any pistol or revolver, except that a pistol or revolver may be temporarily transferred to any person only for the use by such person in target shooting or on a firing or shooting range, provided such use is otherwise permitted by law and is under the immediate supervision of a person eligible to possess a pistol or revolver. Any person violating any provision of this subsection shall be guilty of a class C felony for which two years of the sentence imposed may not be suspended or reduced by the court, and five thousand dollars of the fine imposed may not be remitted or reduced by the court unless the court states on the record its reasons for remitting or reducing such fine.
[Note the broad appearance of the exemption relative to the prohibition it is connected to]
(There is another exemption, to the background check requirement, for temporary transfers to/from gunsmiths for repair and return to owner)
Personally, if I were in a situation where I had to store a firearm somewhere other than at home, my preference would be to put it in a safe or cabinet that provably could not access.