Small hook that is print in place with a latch to increase the strength of the holder. This is based on my other design. I hope its helpful to you. I uploaded the stl and the 3mf. Let me know in the comments if you would like the .step file.

This design is based on my design below.

(Not needed) Slicing Recommendation Notes:

1. I recommend checking the “Avoid crossing perimeters” option, found below. This will help avoid knocking the hinge part off the bed:

• (1)Print Settings (Expert)→(2)Layers and perimeters→(3)Quality (slower slicing).

You can find this setting already selected on my 3mf file.

     2. This is not required but a small support enforcer will help the “holding” part of the latch print clean. You can use a small support enforcer to make this happen.

You can find this setting already placed on my 3mf file.