Top hat hinges which work with a stock top hat. The back plate goes on the top of the existing back plate for the electronics cover.
Align the top hat hinge according to the picture, mark the screw position with a marker, and set in your heat inserts on your marks. You might need to slightly cut the pins under the top hat for easier closing.
Hardware:
4x M3 heat inserts
4x M3x16
4x M3x8
The author marked this model as their own original creation.