I'm installing a new insinkerator garbage disposal. The instructions state to connect the black and white wires from the disposal to the corresponding black/white wires on the main electrical cable. (I've already connected the ground wire) The problem is the main cable isn't color-coded black or white... how do I know which wires of the main cable to attach to the black/white wires on the garbage disposal? Does it matter? Please help! Thanks in advance.

What color are the wires in your junction box that you connecting to?

How many wires in the electrical box?