You don't need to drill any holes for the MP splitter. It uses pre-existing holes and bolts.
You just unscrew the 6 bolts, lay the splitter on top of (well, under) the holes then bolt them back.
Except for the two center front bolts you need to use the included screws with smaller washers because the stock ones have permanently attached washers that are too wide for the groove of the splitter.
This thread by u/starvmarv has some helpful pictures:
https://www.2addicts.com/forums/show....php?t=1232338
Official instructions:
https://www.2addicts.com/forums/atta...6&d=1459977436