So I bought an after market stereo and hooked it up to my 2001 Jaguar xj8 that has the Alpine sound system, the stereo turns on but now the main issue is getting the amp to turn on, I bought an auxiliary rca input for alpine ai-net rad and is now connected to the amp, I see no remote turn on wire in the amp and I’m thinking that the remote turn on wire was integrated into the factory Ai net cable, anyone have any ideas

The stereo I installed

RCA cables plugged in

The auxiliary rca input for alpine ai-net rad