Here is a link to the wiring diagram of the control panel: https://tinyurl.com/yaymjkvk (notice GFI in middle of picture, with 4 wires running through closed loop). No options installed on my installation.

Here is a link to the cut sheet for the 8895GFI: https://tinyurl.com/y8e2ywp9

Otterbine (mfg of control panel) offers a replacement kit to replace the Leviton GFI, which is obsolete now, so I will go that way. Just wanted to know the hows and whys of the original installation.

Thank you