This is the hook that keeps the soft top down when stowed. Mine snapped and it was more convenient to model and print a similar enough version. Costs about $15-$30 depending on your local dealership or factoring in shipping.
https://www.tascaparts.com/oem-parts/mazda-striker-ne51r1344a
Knowing this is 3D printed, I push down and back to help guide the soft top down; good practice even if you replace with the factory one. Driven down the freeway for many hours without concern. If this were going to break again, it would be when attempting to stow the soft top.
Tested with 100% Infill using ABS. Reuse the factory metal bushings to prevent the screw from crushing the plastic.
As always, print and use at your own risk.
The author marked this model as their own original creation.