Freightliner M2 behind the “taco”

Freightliner M2
Remove taco
Top white plug that goes in to the bulkhead module.
On the left brown w white tracer 12v
The pink directly above it 12v ignition
Ground do not remove the stud or drill. Go in to existing ground wire. Pick one.
Device gets decked, mount above and strap to wire bundle coming to from the taco on top label facing the sky.
Remember, never wire to ignition on a newer freightliner.