The cap to the connector with the wires in it determines how your wires are grouped together. If you will look in the base of the cap at the spade connectors, you will notice that some are tied together, then there is a break in the electrical connection. That is how you decide how your wires are grouped together. I replaced mine and it had 18 wires in it also, but I guess I threw it away or I would take a better picture for you.
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