I watched the ProjectBeats guy convert his LV cymbals, he puts the switch on top, under the rubber edging (he even makes a comment saying something about it has to go on top, so stop asking...) but drills a hole to pass the linkage part underneath to the piezo box (Goedrum/Jobeky design) to keep it neat.
See his HH video here:
https://youtu.be/658bexvAPyI
3 zone ride here:
https://youtu.be/1v_n4rh3WU4
Out of interest, how does Jobeky or Diamond go about this - is the switch membrane on the bottom?