I have a 2007 IS250 with ML no Navi and installing a piggy-back automatic speed doorlock. (it wasn't available in my '07 in my country.)

Can someone help me with the location and color of the VVS wire for my upgrade hook up??

I searched and found, it is pink wire J55-19, but where is J55 connector?

Can I connect it ASL wire back form the HU? if I can, which connector and color would that be?

Some said it is blue wire, located at amplifier in passeger side of trunk, but which blue, which connector?

I hope some one can help me out. Thanks in advance