This was the closest I have seen to running tower wires on a Moomba….. starts around the 27 minute mark but there is likely lots of good info in there…

https://youtu.be/vFrBKrwLZh0?si=ILeBPMlgASsPa1F7

I have not had any issues with head smacking…. Not just because I am shorter, I think its a personal preference thing on location, but inside the tower is less of a chance of hitting something when towing for me, if a boarder is so far outside to get caught up in speakers they are likely in the board racks as well

Sorry cant help on wiring colors !