c507 junction connector what is it?

I have posted this in 2 sections since it’s been a few days in the other forum without any response, and I know somebody must have an answer…


It’s got a bunch of blu/blk wires, a black, blu/yel wires.
For some reason three of the blu/blk wires are out of the connector and are twisted together.

What is the purpose of having this connector?

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