Holden Frontera / Isuzu Rodeo '99 3.2L V6 auto

Hi All

Attempting to fit these items myself just a couple of questions

I need what is described in the instructions for the Electronic Brake Controller as the "cold or switched side"
The block connector has 4 wires so what might be the switched side is a bit confusing.
The wire colours are Orange, Green, Red and Grey with Red stripe.
Which one should I connect to?


Dual Battery

I need to connect to the on position of the Ignition switch
Is there an obvious easy access point near the battery or on the fire wall where I intend to mount the solenoid?



Thanks All in advance