Apologies for the delay.
Step 1: cut the belt to size.
Step 2: heat over heat gun or similar
Step 3: place the now molten ends together with some force into the clamping jig(screw a hinge to 2 pieces of aluminum block and drill a properly sized hole across)
Step 4: clamp the block down on the belt, a second person is advised for this step
Step 5: trim the tabs of squished material off the belt and you are good to go
It may take a few tries to get it right