If you want to follow the "pushrod makes a right angle" rule, you'd rig your connection between the ailerons to match up with the colored lines on the attached layout.

You can move the pushrod into the wing as far as you wish, but you'll have to get it through the upper aileron. It's actually easier to do that than it seems. The 2nd attachment shows my Skybolt setup. I used the hardware the mfg supplied (no extra cost) and it actually took less time than screwing around with the horns and their backing plates and all the little screws that never seem to find the holes in the backing plates........ Cut off the base of a horn. Cut a slot in the aileron to match. Epoxy the horn in the slot. Done.