[MakCamaro]

First let me describe the situation.

I am planning to remove the kick panel in the passenger footwell in order to connect an accessory to the radio control module. I need this accessory to remain on for as long as the radio is on after I shut down the engine. I am trying to find a retained accessory power source, which is a wire that retains power after engine shutdown for about 10 mins or until a door is opened.

Can someone point me towards a wire, preferably in the passenger footwell that provides retained accessory power? Ideally I would like to tap on one of the wires on the harness plugs that connect to the radio control module, as I believe that one of them should definitely be a retained accessory power source. Anyone knows which wire I can use?

Thank you in advance folks. I really appreciate any input and help provided.