You betcha.

The idea is to place the horns so that whatever hole you choose for the connecting rod in that horn, a line drawn from the hinge line to it would then have to turn exactly 90degrees to follow the connecting rod.

The green lines on the picture represent those imaginary lines from the hinge line to the connect points. The red line would be the connecting rod. The idea is obviously to have the red lines make a right angle with the green line.

The picture below is actually a very good representation of how I have rigged my Skybolt. Since the Skybolt will put an appreciable force on the ailerons, I chose to move the horns inboard to gain support from and purchase on the aileron in a thick area of the aileron. So I wound up cutting a small slot out of the upper aileron to give clearance to the connecting rod.