I ordered some 3 pt belts off ebay, they came in yesterday. What's the best way to mount the 3rd point? Do I use an exsisting hole in the floor? I am going to mount the retract part at the bottom of the roll bar. What's the best way to get them to unroll, I don't see a release? Also, I bought the belts for the front and rear, I am adding to the back of the roll bar so I can add them to the rear bench. What's the best method to mount them, bungs, or drill hole then sleeve the hole and use a bolt? Thanks