If you happen to have the same bike bag that I have (Brand: “Wild Man”, model: V31) then you might have run into the same issues that I did. The mounting plate is fairly thin and weak, and can crack due to impact.
This is a replacement bracket that replaces the original mounting plate. You will need to remove the original plastic by carefully removing the sewing threads.
Included are three parts:
Additional hardware required:
Outer_plate needs to be printed with supports (recommend using Organic supports).