Help 86 Burb rear seatbelt pics needed.

[gmcjimmy88]

I have been trying to figure out my seatbelts in the rear of my burb. I got a set of seats from an 89. The middle and front came with seat belts. The rear (3rd row) did not have any belts. It is the same seat that is in my 90 Blazer. The simple fold and remove type. What seatbelt goes back there. I have a hole near the roof for the shoulder strap but not above the wheel well like I seen in the 89? I have a factory mounting hole in the floor for a belt as well. Should the 86 have shoulder or lap belts? In theory a set from a blazer should work as well? At this point I will be happy with a set of lap belts back there. I need belts in this thing though. That is what is keep us from driving it (among a few other minor things). Thanks for any help guys, this has me puzzled. I wish the P.O. never took the seats out, or kept the original belts at least.