Both Side Female Buckle

I made a buckle to attach a skateboard to my rucksack.
Originally, there are long bands and buckles on both sides of my rucksack, and by using this buckle I made this time, both bands can be connected and a skateboard can be attached.

The width of the band is 20mm.
The shape of the buckle varies slightly from manufacturer to manufacturer, so I'm not sure if this buckle fits your buckle. Try it anyway. Good luck!!