Harness crotch strap - mounting?

I've got this 6 point harness that I'm putting in my mk1. I've got most of it in all good, hopefully. I've just used the original seat belt mounts for the lap belt, and I've got a harness bar under the rear parcel shelf for the shoulder straps to mount to.



But I'm not sure how the crotch strap should be mounted up.


Do the straps go down to the floor and attach to a point/bolt there? And would it be better to have one or two bolts in there (both straps to one point, or a separate point for each)? Or is it meant to go down through the seat, and then back to the same mounts as the lap belt?
Does anyone have any pictures or suggestions of how the strap should go? I'm just not sure how its meant to be set up.

Hey pete come over and chaeck how ive mounted my ones in the rally car if your interested mate.. or i can get you some pics if need be :)
 
 

Thanks for all the input guys. I've been doing some web searching but still can't find any pics of how its been done. I've got a couple of those plates, so will use those.
With the lap belt, is the mount on the outside of the car ok, or too far back? Could I just use another plate on the tunnel that lines up with the mount hole on the outside?
 
Matty, is your number still the same? And are you about on the weekend? I'll see if I can make a time to duck over and check yours out. PM me if your number has changed. Did you get my email about that red mk1?