Happ buttons on Mc TE

I really like happ buttons ever since I got my MK te stick. I’m just wondering if it’s possible to put happ buttons in my Mc TE stick, that I have the MK Faceplate for.

IIRC It is possible, but the case doesn’t have clearance for them unless you do some cutting.

I’m fine with a little cutting, were can I find a tutorial on how to do this?