Credit to Domi1988 for a great design. And thanks for including the Fusion 360 files. It made it easy to modify the vertical fixed port to fit 1 1/4 inch diameter vacuum hose and make the connection as compact as possible.

To connect the 1 1/4 inch vertical fixed port (FixedPort1_25ext.stl) to the snapmaker 2.0 CNC spindle head, remove the M2 screws and replace with 3 M2-0.4 x 8mm flat head screws.

M2-0.4 x 8mm

I used the removable dust port option that gets secured with an M3 screw. duct_screw.stl Not the magnet option.

I added a dust shoe part that tightly fits on the removable dust port. (DustShoe2.stl) I designed it for 70mm Dust Shoe Brush

After printing DustShoe2.stl, feed the dust shoe brush through the groove and trim. Then the 70mm bristles need to be trimmed back so your shortest bit in the spindle does not require the machine to bend the brush excessively when the shoe is pushed all the way up against the CNC spindle. The shoe can be adjusted down for longer bits approximately 20 mm.

I include fusion 360 model. vacuum5mod v8.f3d

Snapmaker 2 A350

No

Yes

Fast

File sliding connections between adapter and duct so duct slide on and off easily when screw is removed.

I modified Fusion 360 model from https://www.thingiverse.com/thing:4147717

And added a dust shoe brush holder. And used 70mm CNC brush in the brush holder. Amazon link included in description. Brush needs to be trimmed.