Boot lid First Aid Kit

Recently I bought a first aid kit and triangle, genuine Mazda. This is huge and when you’ve got a couple of bags in the car it always seems the thing you have to take out before the bags fit.
Noticed a couple of slots on the underside of the boot lid and thought I would get a mate to 3D print a couple of brackets.
Now all done, left a bit of extra length on the straps as thought maybe an umbrella may fit. Any thoughts



How did you fit the brackets to the boot frame? Self tappers?

I didn’t want to screw to the boot lid so the 3D printed brackets hooked into the oval holes. Then turn 90degrees to lock on. I’ve asked him what the file is called on Thingiverse so anyone can make them from open source files.