There should be a plug going to the motor, thats where you want to connect, it there are three wires it sounds like you have the connector that goes to the door jamb..Thats before the door switch & the yellow should be the 12v feed to the switch....By adding the relays after the switch & before the motor the system acts completely normal in that it reacts to the master switch or the door switch just like stock, but now it should recieve a better power & ground signal to the motor.... BTW I didn't recieve a PM from you till a few minutes ago & I've sent you one back..