Noob question; Installing intellitronix digital gauge, (tw: LOTS OF DUMB QUESTIONS)

Team, crazy idea! Can I connect the two wires to the one wire for the dash?

For example; connect the dash's 1 wire for the left turn signal to BOTH the light green wires via splice?

Would that work?

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ALSO: does not connecting the passenger side rheostat that controls the windshield wipers have any bearing to my headlights and turn signals not coming through?