Before I do something dumb

I have searched but didn't find exactly what I was looking for. I would like to build a heat stick this weekend and dont want to zap-fry myself in the process. My question is, where and how do I attach the ground lead to the metal section of pipe? A nut and bolt like as shown on the cedar creek page, or is there another way? Like I said, I dont want to mess this up. Should I encase the nut/bolt with jb weld or is it ok exposed? I know the terminals on the element need to be sealed, but not sure about the ground.

Seal everything! Next time I build one I will clean all areas to be sealed w/ rubbing alcohol. Any sealant is only as good as the substrate is bondable. A few ways to ground or skin a cat as they say...

ground wire clamped against pipe w/ plastic coupling
http://www.3d0g.net/brewing/heatstick

grounding screw through pipe
http://www.3d0g.net/brewing/heatstick

My prefered method, ground wire crushed through threaded drain cap
http://alfter.us/beer/heatstick/assembly.aspx

USE A GFI!