Here is a picture. It's yet another wiring diagram. I don't know if it will help any better, or if it just makes things worse for you?

https://empegbbs.com/ubbthreads.php/topics/370309/Rio_Car_and_empeg_Car_mk2_Sled

If you look at that diagram, the part in the upper right corner labeled "Tuner" is the bit that's missing from the Mlord dock, and you have to make it yourself and wire it yourself. There are no metal pins in the Mlord dock's docking connector for those wires, so you'll need to order the correct parts from digikey and slot them in.