In contemplating this project again today and manually raising the compartment cover as if on a hinge, I stumbled onto the fact that the cover can be set at nearly a 90 degree angle and left there while adding or removing items from storage. You do this by first lifting the front of the couch and setting it in a position that allows the cover to be raised, then lifting the compartment cover 90 degrees, then hooking the two angle brackets that suspend it onto the same cross bar at that new angle. As pictures below.
Land of 10,000 Lakes
2016 Forester MBS 2401R