Ga, why didn't you just ask when we spoke last, I had my camera out and everything for you when I took the photos of the dot.
Flaperons don't need any more servos or extensions. It's just the two servos you have for the ailerons then flaperons are A radio set up.
I have them set up in my Hots and have them slaved to my elevator. {Don't even think about it or it will hurt your head!!}
I almost never use extensions anymore, I lengthen my servo wires by cutting and soldering to make my leads the length I need.
On the RX I have two 6 inch leads that are always there for my ailerons to plug into so I don't have to plug in and out of the RX.
I have Futaba and off the top of my head I think the flaperons set to Ch. 1 and 6.
READ your instruction book that came with your radio!!!!!!!!