Don't you be tellin' everybody that! That's a secret! :rofl:
If you're a big ******* like me you can use your left arm to pull the belt, and slide your right arm down in there (kinda hard on the arms if they're any sort of size, or you gots the Popeye forearms) and push that little tin tab up in there to hold the tensioner arm in place. To release it, give the belt a yank, and listen for the little 'clink' that is the tab flipping back down to it's original position.
And for the record, they's 10mm bolts, not 8.