The Rotavecta comes with a 20 meter cable. If you've acquired a unit that's been salvaged from a previous installation
, the cable may have been cut, but the stub is most likely the original. Just use the same gauge and type cable, connect with good quality heat shrink crimp connectors, and a layer of heat shrink tube over the finished connections.
You should know that Raymarine
recommends the Rotavecta for POWER boats, not for sailing. If you search various sailing forums
, you may see why that is. Of course, the Rotavectas are cheaper, especially on the used market, which is another indication of their poor utility for sailing applications. I would point out that IF you want electronic wind data as an input for an autopilot
or course computer, you should DEFINITELY get a windvane