For the TOC-53 I usually mount the throttle servo in the slot in the fuse side above the wing on the right side. This places the pushrod just inside the motorbox side and the servo arm can point either up or down depending on how the carb/reedblock is oriented.

I mount the choke servo in the hole in the side of the motorbox, again giving flexibility in which way the servo arm points.

Using this arrangement I can change the reed block and lonkage in about 10 minutes.

I had to work this out in order to do testing on the engine.

TF