Need 4 M3 8mm screws to connect the two plates. One can heat the screws up and press them into the holes. The GoPro no press mount can be used with a nut to tighten it down. This would need a longer screw, e.g. 10-12mm.

I just improvised with rubber bands and paper to get the camera cage connected with the top plate in the photo. I also added a newer version to 3d print a combined part.

Creality

CR-10

No

Yes

0.4

The cages need support. I tried the tree in Cura, worked great.