I guess I could have explained that better, sorry. Now that your servo is mounted with the control arm, mark the height of the arm straight over to the side of the fuse (mark the outside of fuse). Take a string or piece of cable and pull it from that mark to the control horn hole. Mark a line on the fuse using the cable that's long enough to be in the "ballpark" of where the hole will be in the fuse. Now take the string or cable and stretch it between the control arm hole and the control horn hole (above or below the fuse, depends what plane this is). Mark where that string intersects the line you made on the side of the fuse. You will probably have to hold the string in the air and eye it since you can't really connect it without a hole in the fuse. It works, I've done it a few times now. Cut a slot in the covering or plywood. If you need to put some tubing in the ply to guide the cable it's not a big deal, I've done that.

The crimp will hold with just one pass. Maybe we are not in synch with what we are both saying here. The cable goes through the crimp, then through the turn buckle, back to the crimp and through it again. Then crimp it. It will hold. The picture you show has an extra loop which is nice but not mandatory if you are out of cable. My picture shows that the extra loop is still a little slack after over at least 100 flights.

The picture is a CAP232 25% and has the two loop crimp but I had the extra cable. Also it shows my less than professional guide tube and balsa crammed in the hole and thick CA holding it (for two years now, no problemos).