This was a super simple install.
1- Atlas HO C420
1- Digitrax 1" 8 to 9 pin harness
1- LM3S - Sound Module
1- Sound Systems Speaker and Baffle
-little Capton tape, 3m 2 face for speaker,
Stock lights had resistors built in.
No cutting required, Plugged, taped, soldiered speaker wires - DONE
Easiest one yet. Maybe 20 minutes.