Spent the bulk of the time figuring out where to run the battery cable for my rear mounted battery. I tired to keep it separate from the other runs and use conduit since it'll be high amperage during starts. I also didn't want it near the fuel valve and pump/filter assembly so I sent it up the right hand side. I drilled a hole in the bulkhead aft of the rear spar (the rear spar and spar already have holes). I started running the conduit through the right gear tower and into the spar (after rooming the grommets that were already in the spar).
The battery cable conduit going through the spar center section