Celestron StarSense holder with various connection options.

The generic base has no connection and can be merged with other models such as a vixen rail or a losmandy clamp.  The upper portion of the adapter will need two M5 nuts and thumb-screws.

The C8 model is made to use band clamps / hose clamps to secure the holder to an 8" sct tube.  The “strap holders” are to prevent the band clamps from scratching the tube. 

The C11 model connects onto the finder-scope bracket of a Celestron C11.  I believe the C9.25 uses the same bracket.  The “finder bracket knob” goes with this.  Put a flat-head M3 nylon screw through it, a M3 nylon nut in the recess, and a second nylon nut (exposed) after that to lock everything together.  Another nut goes in the base of the bracket.

I also included a generic C11 bracket that you could merge with other models.