Hi,
What sort of information are you after?
M1 Tune creates a pinout list (Help | Firmware Wiring) that shows which pins are used by a function. Thermocouples are wired directly in to the E888
E88 Wiring documentationAs to individual functions such as solenoids controlling transbrakes and the like, I prefer to wire them to switched VBatt+ and then, dependent on the current draw of the device, low side switch them using either Half Bridges for 2A+ loads, or Low Side Injector/Ignition outputs for low current draws.
You would need to get the details of the device that you are controlling from the supplier of the device.