ModLoader requires any plugin/patcher loader that is capable of loading Sybaris patchers.
For COM3D2 following are known:
[BepinEX 4.0 or newer] (https://github.com/BepInEx/BepInEx) (personal recommendation, yes I'm biased towards it)
Sybaris 2.2 is also a possible option, the functionality is not confirmed nor it will be as I'm not fan of it.
Put contents of Sybaris into Sybaris folder
To enable Mirror Props put contents of Mod Folder along game's exe file, and Contents of UnityInjector, into Sybaris/UnityInjector.