Seat belts

[Potter]

So this might sound confusing but does anyone have a seat cage set up running from B pillar to B pillar that is about at the window and it runs down to the floor and up in front of the seat to run 4 point harnesses for the seats? I'm not looking at doing a full cage but I wanna do 4 points the right way. Also does anyone have a 4 point harness set up you can show me pictures of? Thanks for taking the time to look at my post.