Clifford RSX 3.5, 1999 Dodge Durango

i'm installing a clifford RSX 3.5 into a 1999 Dodge durango, the problem i'm having is with the ignition and acc. connections.  The wiring diagram I have says:

this is from the12volt.com

I also found this:

However, in the harness of about 25 wires, none are just dk/blu.  When I put a meter on all the pins, i find a blk/whi that appears to be ign, and a brwn/green  that appears to be an acc.

but they are all small wires.  Usually they are bigger, ie) Ford/GM

What wires should I use??

Thanks!