Wiring For Replacment Water Heater

[Wiring For Replacment Water Heater]

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[Wiring For Replacment Water Heater]

I did not receive a new remote switch with the new water heater.

I have found a website that shows the conversion and it shows using a dual switch and not using the old switch. 

[Wiring For Replacment Water Heater]

How do I rewire our water heater from a GC10A-3E to a GC10A-4E?

The GC10A-3E has 3 wires they are Green, Blue and Brown.

The GC10A-4E has 4 wires they are Green, Blue, White and Orange.

What GC10A-3E wires corresponds with what GC10A-4E wires and what

Do I do with the 4^th wire on the GC10A-4E?

I have the 3E & the 4E wiring diagrams but have no clue on what goes where.

Ron Crow