You can drill in the pillar section. Then later if you decide to get rid of the shift light or the car and want to go stock. You can
1. either get a new pillar at the junk yard not expensive like 20 bucks.
2. Or you can buy a can of gray vinyl paint $5.00 then bodyfill fill the minor holes with puty or bondo and just spray the pillar gray with a spray can. That won't be hard at all.