Before starting assembly, make sure the jumper wires you plan on using operate properly.

Put the multimeter into the continuity mode, which looks like the picture. Also, you need to click the select button once after turning the knob to that setting. You will be able to tell when the solid arrow with a line changes to an open circle and pulses.

Then, press one of the prongs onto each side of the wire. If it beeps, that means a signal can travel through and the wire works properly. If no sound is made, get another wire. Keep doing this step until all five jumper wires work properly.