Securon inertia reel seat belts

I've got fed up of fighting with the static belts and bought some new inertia reel ones made by Securon (as sold by Paddocks)

They should fit the same floor (bottom edge of seatbox) brackets and I have got the hard top angle brackets for the top triangular bracket.
What I am not sure of is how / where to mount the reel? I'm assuming the back of the bulkhead?

Any suggestions folks?

in the side of the rear tub on the seat side of the bulkhead ther is a pocket and a plate half way up behind the door latch pillar the reel should fit nicely in there

thought id add this piccy for amusement

I've bolted mine to the top rail so its just behind your shoulder.

Thanks - a couple of options there for me to think about then