I used these:
https://www.amazon.com/gp/product/B071ZKQ2X5/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
The Mustang had metal doors, so I just epoxied magnets to the backside of the door and then to the door panel in matching spots, with the metal door sandwiched in between. For a...