Sorry about no pic's. I have to learn how to do that.
TJohnson nailed it though. no pun intended.
What I did.
Bend the little points on the "round head" flat. (the part that would normally stick into the the drywall, under normal use)
Cut about 1/16 inch off the threaded end. Just enough to get rif of the threads.
Drill a 5/16th hole in the ECB. 1/4 inch might work also. I did't have one.
I put a star washer on the outside of the ECB (not sure if needed, I had one so I did it.)
I used an anchor for 5/8th drywall so I added washers to replace what would normally be drywall.
I used a 2nd anchor as a "nut" (replacing the cut off threads) Put everything in place, screw it to compress the anchor. Remove the 2nd anchor and your done.
Before I started. I compressed a test anchor to get an idea of how much space I would need to fill with washers and decide how far to compress it. The anchor only will compress so far and I wanted to make sure it was firm.
In the end I think I used 9 washers and the anchore bent to a nice 45 deg angle. This obviouly depends also on your smoker wall thickness.
If things go wrong, just snip the "wings" and it's out. If you don't like it just plug the hole with a screw and nut.
I suppose if one really gets into it. One could put a few in various spots on the smoker for "temp test points" and when "not used" plug the hole with the original achor screw or similar. I'd suggest smaller anchors for this. (not so many washers sticking out). Maybe a 1/4 inch anchor for drywall.
Hope I didn't get too carried away here.