Does anyone know of a wiring diagram for a UPS control cable. One end needs a RJ45 connector and the other an USB A connector. Ive got loads of USB and RJ45 connectors so I thought Id try and make one rather than buy one.

After a hour on Google I turned up nothing other than: Apparently an ethernet-USB adapter does not work.

My UPS is an APC BK350EI

Any clues,