Lots of head scratching on this step, but it turned out ok. I epoxied in some 6-32 locknuts in the slanted brackets. The head will attach to these. The bracket will attach to the wing tip via screws and 8-32 nutplates inside the wing tip. I made a cut out under the head so that the molex strobe wiring connector would fit through. This will allow me to easily replace the head, if necessary, without removing the wing tip.