ORIGINAL: gphil
When installing a tailwheel on a plane that did not have one to start with
If you mean the tailwheel bracket, what I most often do with a flat bottom fuselage like yours is to cut out a couple of inchs of the fuselage bottom and cut a piece of 1/8 inch plywood to replace the bottom with then the tailwheel bracket can be screwed directly to the fuselage bottom without the need for nuts.
John