Tattoo Machine Troubleshooting 

Clip Cord Connection Points Troubleshooting Answer # B120
Problem	Cannot connect clip cord to machine.
Because	Cannot find holes.
Check	The rear of the machine that there is an accessible  hole beneath the  rear spring saddle and the rear binding post.
Why	Both halves must have separate connection points to complete a circuit.
Cause	Missing hole or rear stand-off is rotated  and the hole cannot be seen.
Remedy	Drill a holes, rotate rear standoff.

Also see  needle insertion in tube.

(Bring up separate labeled parts window) then re-size the new window and drag it to the side so that you can see both windows..