Do you have EL wire but have difficulties attaching it? As long as you are trying to get it to a magnetic surface (metal) this magnetic mount for EL wires with diameter of 2.3mm or lower is for you! Only things you need is a 3D printer, 4 x 2mm magnets and some glue.

Modeled to accept 2.3mm > diameter EL wire.

The magnet required is 4 x 2 mm that you will be gluing in the corresponding place.

The mount is made to be printed without supports thanks to the magnet mount having 45 degree overhang on top of the round hole which allows printing without support. Modeled and printed using 0.6mm nozzle, but don't see any negatives trying to print it with smaller nozzle size.