Do you have the mach 460 system first off?
I have a 98
stang and I don't have it. Anyway what I did was when I installed the cd player I put a 4 channel amp in the trunk so I ended up running all new wires to all the speakers. You can do that with a cd player too if youd like to avoid the hassle of adapting the stock wiring to your player, plus if you install new wiring, you can take all the stock amps out, free up alot of room, and when you install the new wiring it will be much better quality wire then the stock wires so that if you ever wanted to put in a 4 channel amp to power your speakers, the wiring will be ready to handle the power.