Mount a Finder or Other Accessory on My Clamps....

To get started mounting a finder or other accessory on my clamps, drill
a #7 hole in the dovetail base or similar mounting hardware.

Use a 1/4-20 "tap" to put threads in the hole. I usually cut off a
carriage bolt that's long enough for this chore. If you ""flatten"" one
end with a hammer it'll fit into the threaded hole and stay there firmly.

I use a 2" fender washer under the dovetail. Put the dovetail-shaft
through the hole in the clamp and use a knob.

Note the ""locking" 1/4-20 nylon screw in the side of the clamp
so as to keep everything in place.