Do not reverse the + and the - wires

Red wire is positive (+), Black wire is negative (-)

Using a soldering iron, melt the solder to attach the wires to the panel.

You may need a third hand for this step.

Be sure to completely cover the ends of the wire with the solder.

Soldering is dangerous as the iron must get very hot to melt the metal solder.

Solder dripping off the iron can cause sever burns and start fires on clothing and tables.