You should probably check out UP GP7 #112 which is linked in the required items tab.
Built to meet SRC standards, not donkk.
Compatible with other EOS locomotives
EOS DISCORD LINK:
https://discord.gg/G5WA3bSh
Instructions can be found here: https://steamcommunity.com/sharedfiles/filedetails/?id=2737610617
Make sure the SLAVE, INVERT DIRECTION and REAR CONNECTOR RCV key buttons are toggled if you're connecting this to the rear of the UP GP7 #112.