Nate, you need a 7-way plug up by your headache rack! Come to San Diego so we can install your boxes, aux tank, and we’ll put that 7-way plug in while we’re at it!!
That little o-ring is your tension gauge…close your fastgun off the truck, slide the oring all the way up so it seats up against the body of the fastgun. It seats in a slight pocketed area. When you install the fastgun and tension it, the oring should be about 1/4”-3/8” away from the upper body of the fastgun, that’s how you know it’s properly tensioned.
Set the o-ring on the fastguns before you clamp them down. There should be approximately 0.25 inches of space between the body of the clamp and the o-ring when you have the un-stretched length set correctly.
