yes two connectors, one goes all the way to the factory amp, you amplug the amp and plug the amp harness into the aftermarket connector, run the wires back and connect the apropriate ones to the aftermarke HU harness, the second harness plugs into the harness that was originally plugged into the factory head... hope this is clear expect job to take quite a while.... be careful not to blow any fuses.... disconnecting batter when wiring stereo is a good idea... good luck

__________________
95 M3 (US)
94 318is (EURO)
87 190E 2.6