You can, but you increase the risk of shorting out your electronics. I strongly recommend mounting your electronics on a non conductive surface.
If you do mount it on sheet metal, double and triple check the common faults:
- Check your crimps with a tug test.
- Insulate your cRIO from the sheet metal, and be sure to use an insulated mounting method.
- Insulate your camera's mounting post.
- Seriously, re-check your crimps. I mean it.
- Make sure you have no exposed copper. This may mean trimming your wires to length.
- How are those crimps looking?