LM317 DC-DC Stepdown Adjustable Voltage Regulator case

I lost the 6v battery charger for my son's toy cars (not the small ones but the ones that you ride while sitting down), even on aliexpress the 6V battery chargers cost more than those from 12v .. that's why I decided to buy this stepdown from aliexpress at the modest price of € 0.40 and use a charger that I already had from 9v 1A (even from 12V is fine but with these stepdowns I prefer to stay on the 3V range of difference).

This case has been studied by me expressly for this module LM317 (in photo)

the case closes with a screw.