Wiper wiring

Hey All, I have run into a snag and am hoping to borrow your expertise. My wipers work at high speed, but do not work at low speed. This probably a dumb question, but it if you look at the diagram I have included, it looks like 2 prongs should be connected to the same wire (V6-18DBL), do you think the fact the they aren't connected is causing me the issue?

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