The older Dyson models came with a charging dock, but for the middle-child in my Dyson vacuum family, the DC-31 didn't come with one.

This will work with the DC-35 too but that model already comes with a dock

Note: Based on recent comments, it appears that the dock may be a tight fit with the newer style battery packs. (I think).

Print both parts and assemble/glue.

You may need to clean up the power adapter hole. When inserted, it should fit snugly requiring a small bit of force to get it into place.

The holes in the front allow screwdriver access to the mounting holes.