[ILDiver]

I'd need to see a pic as well, but maybe... On the back edge of the handle about 1/4 to 1/2" from the bottom, drill a hole down toward the bottom of the handle at about a 45 degree angle. Then run a dyneema or other cord through and tie it into a loop that you can clip to.

EDIT: Found a pic and did a quick lil illustration of what I meant. the red line would be the drill line, yellow...the loop.

Edit 2: But looking at the pic closer... If you drill on that back edge, ther is prolly a seem. Maybe go through halfway from that bolt and the back edge and drill from one side to the other?