I had to drill holes in my Corolla because my B-pillar didn't have a nut for the 3 point seat belt, so I had to get the seat belt with the buckle and all the bolts to the body and some nuts to hold the belts in place, and I had to drill a hole at the top and two holes at the bottom right next to where the lap belt is supposed to be at. I had to use a magnet on a small plastic tube to hold the nut that would have to grab the bolt at the top of the B-pillar, which was a pain in the A** to get right.
The red X's are where I had to drill the holes into the body, the green check mark is the only hole that was already pre-drilled and tapped with a nut, and the red line is pretty much the route I took to installing the nut to hold the top of the seat belt.
Up close on the bottom of the B-pillar where I had to drill two holes, one for the actual bolt and one for a little flange that holds it in place. I'm very skeptical as to how it'll hold up in a crash but hopefully I don't manage to find that out.
Any ways with a drill and all the nuts and bolts it should only take about 2 hours to get done on both sides, I'm happy as hell that I don't have to deal with the automatic seat belt anymore.
Oh and I noticed that you live in Lake Hughes, I live in Palmdale so welcome to TN from a neighbor