When you want to add in the red wire, look under the saber with the core out. There is a 3mm hole
to the left of the spacer location, under the saber. The wire will simply be plugged in and the wire
will stay in place without any glue.
Then you screw in the core, which also acts to hold this piece in place.
In order to hold the red wire at the top, you will fold this under around the opening in the core. If you
need to open the saber, you can simply pop this extra wire out and pull it through the wire holders.
As an alternative you can epoxy the red wire to the backside of the emitter and to open the saber
remove the lower core and release the wire at the bottom.