One butt rib had a feed-through already available, thanks to the graphics cut into the rib. I had to drill the other side. The cables require a bit of feeding into the wings when deploying them, but very little feeding, and it's easily manageable by one person
Some creativity was required with feeding the cables under the seat. Space is limited, and the cables must go under the rear seat base crossbar, for reasons that become obvious when you fit the seat. I wove the cables over the bar just behind the seat, so they wouldn't interfere with the elevator controls.
Note: Always be aware of any installations that may interfere with pushrods, cables, etc. I've had to reroute a few things after they were installed simply because their proximity to any of the controls made me uncomfortable.