Rear shoulder belts?

I think I got the retractors from one of the many seat belt suppliers that are online, so nothing special there. I think that on both far sides of the package tray there are factory "slits" for the seatbelts and I then cut a third "slit" for the middle belt. I'm going to my shed tomorrow and I will then be able to upload all the pictures you need to show you how I did this