I used a Sharpee and with the JEDI lights snugly fit inside the opening, marked off the holes I would have to drill.
With the holes drilled and tapped only a few turns, I used some one inch 4-40 thread screws to carefully mount them lights in. First, using the supplied plastic pieces from the JEDI kit, I threaded the plastic nut all the way down the 4-40 screw. Then it was a careful job of, from the metal piece, lining up the clear lense, LED template, the screw spacers on into the screw. Once the screw was a few turns snug and tight into the surround, I rotated the plastic nut down until it was pressing on the PCB. Now the JEDI lights are held firmly in place.
Yes, when drilling holes in delicate parts, be very very careful. I needed to make one hole a little bit deeper to accomodate the tap. Opps. I went all the way through. I'll patch this up with some solder and hope no one notices!