The wire enters from the side of the spring and enters from the top through a hole drilled through the center of the nylon insulator. The wire end gets bent around to create a contact point.

When installing the nozzle cap with the wire for the upper contact I found it easiest to wrap the wire counter clockwise around the spring 6-8 times and then as you screw on the cap you unwind the wire by pulling it out the nozzle hose end. Then once the cap is secured the wire should be headed out the nozzle hose end and not be wound around the spring to impede the nozzle handle operation.

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Last edited by ed1966ss; Mon Oct 12 2015 05:55 PM.