Adding Parking Sensors - Connecting Multiple Wires

[personalt]

Anyone know how ford makes these 'multi-wire-connections' ? I need to add the other two parking sensors and they will connect to this point. Any idea how ford makes that multi-point connection?

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[Zyvin]

Not sure how the wiring harnesses are built at the factory; but Ford sells a “splicing kit” for repairs etc. they basically use common solder splicing with heat shrink for wires 14 gauge and smaller.

I would tie the common wires into the closest sensor to your new (added) ones, and not at the current splicing point.