I am not good at editing stl file, so I redraw it by fusion360.
This distributor fits camlock, because my dust collection all using CAMLOCK system.
You may need 3mmx40mm support pins to contact two parts, mid body part can be added many as you like. Also 8 Hot insert nuts needed for right and left side cover.
I printed mine using ABS, all parts fitness designed for ABS.
The author remixed this model.
Make it fit camlock system