Car Alarms: keyless entry install, ohm resistors, resistors in series

Question
I am installing a IC Dynamics keyless entry in a 1999 grand caravan with power locks. I have the 1.5k ohm and the 249 ohm resistors needed(I made a 250 with a 150 and a 100 is this ok?).
I have looked for the white/green wire to tie into but i can not find it. Is the BCM by the fuse's? I have found 4 20pin connectors but did not find the wire I need.Can you tell me where this wire is and where to tie into it. Also where is a good place to get the 12v for the power to the unit.

Answer
If your van came with a factory alarm the values are 4020ohm for lock and 665 for unlock.  Without a factory alarm those values are correct.

"I made a 250 with a 150 and a 100 is this ok?"  Yes, resistors in series will work fine for this.

The location according to DEI is "left plug at bottom of fuse box under cover (1 of 3)".  To tie into it, just strip back about 1/2 inch of the insulation and solder your wire to it.

The best place to get power is right at the positive terminal of the battery, with your fuses as close to the battery as possible.