As suggested the tool tray cover definately fits under the ally locating lugs. There is however a central rear fixing screw for the tool tray itself which necessarily is screwed in at a shallow angle, as there is no access directly above, leaving the head proud. Although a custom tool tray, you can see the screw head I refer to here, central back.
This will snag on the underside of lid, but a groove filed into underneath of same will ease the clearance allowing lid to be slid back enough to drop into position.
