1968 Barracuda washer pump positive terminal question

Sons car is getting a 2 speed wiper, and 2 speed switch. But I have electric washer going in it. I modified the floor pump to use a pushbutton switch. Will pin the brown wire with stock connectors at firewall bulkhead, will jump off fusebox and down to momentary contact switch. Same height as stock pump button. Green primer. Plan on painting it black. See pix below.

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