NO DRILLING!!! Don't do that! There are holes already there which the Do Luck uses.
As I recall (been awhile), you'll need to unbolt the anchors for the seat belts, and remove the spacers that are there stock (at the bottom). Peel back the carpet, and you'll see a 2" round black sticker - peel this off, and there are the holes.
Don't tighten the middle of the bar until you have both sides in, and understand that you will have to cut the carpet for a seamless install (how you do so is up to you).