1999 Catera Cadillic lock / unlock

I've installed remote starter / alarm in a 99 Catera. the remote starter was easy the alarm was easy ,, Problem I found two sets of BLACK/ purple and Black /brown wires to interface the locks on both side of the kick panel driver & Passenager. Tested the wires and no change in current or switching positive or negitive when using the factory keyless entry. Imagine there are a third set that I'm not finding. I tested the door switch , it's fine ..note Catera's are packed with tons of wires and the doors have a Quick disconnect connector that twist off for removal. I would have to drill thur the door  by the hinge last resort , to attach the wires to the switch on the door it self. I have all the carpet up and plastic removed,(installing video system as well).. Any pointer would be great thanks .  lock / unlock  ????Audio Connection