The DOMYOS Rack 500 comes only with two weight holders, so if you need to store extra weights you are out of luck.
Unless you print additional weight holders for it!
These are designed as add-ons to add to the rack, they fit on the large steel beams and are secured with M5 screws (15mm) and nuts.
I recommend printing with PETG and increasing infill in some areas of the top part.

↳ Feature type vision on PrusaSlicer, showing extra infill on screw holes and connection with top part.
2 M5x15mm screws
2 M5 nuts
The author marked this model as their own original creation.