Typically an eyebolt affair with a block-headed bolt with a hole drilled in it to let the leg of the eyebolt slip through with a locknut on either side.
That top mounting bolt of the tranny passes thru the eyebolt.
Sorry the oil lines are in the way, but you can start to understand a little better maybe...
Better still- #40 bolts through the right side mounting plate. A better mod is to install one on each side, facing opposite directions (push/pull)