Furuno 711c and new wind sensor

Billy Newport

My MHU 213 on the mast is broken and so far I can't get it repaired. I've installed a WS320 on the mast and configured the H5000 to use that instead of MHU for AWA. The H5000 is calculating TWA etc correctly. Reconfiguring my TZ2 was easy enough also. Where I'm struggling is changing the 711c auto pilot to use the WS320 rather than the MHU for wind data source. The manual talks of a change data source menu in the system setup menu but on my 711c, it's just not there. Is it locked down or something? Does anyone know how to tell the 711c to use the WS320?
Thanks Billy, 55#56