I had an older camper that I replaced the ice box with a dorm style 110 volt fridge/freezer. I used refrigerator bars to keep stuff on the shelves. Actually I still use them with my newer camper so stuff doesn’t fall out when I open the door.
I put screw eyes on either side of the fridge freezer doors and used bungee chord to hold the doors shut while traveling. Worked well for me. I have read where some folks have used Velcro to keep the door shut, but never tried it myself.
2016 3500 HD Durmax
1994 S and S 9.5' Camper (SOLD)
1999 S and S 9.5 Camper