Update: Was able to get it working with a relatively easy fix. Sunman gave me the idea of seeing what the actual AgLeader foot switch used when wanting to do like I was wanting to do with an aux input. It was wired to use the E2 input. So I switched the pins in my connector and assigned it to the E2 input on the screen. Everything worked great after that. So I guess E1 must be reserved for something else?

(IMG_2735 (full).jpeg)

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IMG_2735 (full).jpeg (85KB - 23 downloads)

IMG_2736 (full).jpeg (92KB - 31 downloads)

IMG_2737 (full).jpeg (87KB - 26 downloads)

IMG_2738 (full).jpeg (177KB - 31 downloads)