
You can use the punches manually with a bolt (preferable with a bearing on it) but the fastest/easiest way is to use a pump and a hollow hydraulic ram like this:

Made up a template so that I can get the hole straight and have it the same on both sides, I winged it when doing my car and the holes are slightly on the piss:

Slotted hole:

Material removed:

Camber plate installed:
