Every part needs a backside. Simply mirror every part and superglue them together.
The upper mid section needs just the right amount of support for the place where the hook will be inserted. Careful with the right angle amount so support isnt added to the beveled edge of those parts but insted where it is supposed to be. You will figure it out.
Where the hook is inserted I used superglue at the bottom and held the hook in place until stuck. Then filled up around it with thicker glue.