figure out where you want it to sit.
place masking tape where the holes will be and smooth it onto the body with your fingernail to make it adhere well.
Mark onto the tape for drill positions.
Use a new drill, press very lightly and drill slowly right through the tape. Allow the drill to do the work without pressing down hard at all.
Once it's started, just hold the drill steady and let the weight of the drill do the work (keep the bit speed slow).
That should do it.