9) Lastly, youâ??ll need to attach a plug. Take your polarized plug and cord, and crimp the two sets of wires coming out of the top of the hood onto the cord, in parallel. I used a polarized plug (with one prong larger than the other) for consistency. Remember: youâ??re dealing with AC here- black is the â??hotâ? lead with 120VAC running through it, and white is the â??neutralâ? lead, which means it is technically neither hot nor ground. On a polarized plug, the wire connected to the wide prong is the neutral (or white) lead, and the skinny prong is the hot (or black) lead, so connect them the same way.