i just finished helping a guy that has an 05 rocket and one of the experts cut up the wiring. what a mess.
that connector with all the wires cut is not the factory alarm connector.
the guy i helped had zero mechanical/electrical experiance i hope you have some.
we were able to comunicate through (google meet) phone him showing me the wiring systems ect that i needed to look at.
the way that we need to start is to bypass all the ignition/keyless stuff and wire straight from possitive battery (for checking purposes) to the engine management relay.
so you will need a clamp, a fuse 20 amp, and a wire about 3feet long 12 or 14 gauge so we can clamp on battery and hook to engine management relay
if you want me to help just ask