Rear seat harness mount help

[Hercfe9]

Looking for some ideas on how to mount a set of Corbeau 3 point retractable harnesses on my rear Corbeau bench seat. Any ideas or pictures would be great. I have a roll cage but there are no bars near the rear of the seat.

 

[NYLES]

Your going to have to have something above the riders head and behind the seat, simply by the way 3 points are designed. 4 points you could do