One of our members Doug VE7VZ has put together a great resource for those of us wanting to use the clubs Yaesu Fusion (C4FM) repeaters that are equipped with Wires-X Functionality.
It is primarily target at users of the FT70DR or FTM400XDR but contains a ton of general Wires-X information as well. It can be found on the club wiki at FT70DR or FTM400XDR