I suspect that there probably is some where the wiring diagram.
Unless the wire was kinked and a broken wire, it should work. If the test switch shows that the plug is active, then ask Davis to replace it free and send them back the broken one.
Fortunately when I got my VP1 way back, they included the test switch with it. They don't do that any more, but should. Another blessing is that the wind sensor at the top of my mast has been there since 1993 and still works. Nothing works that long,but right now things work.
I guess the luck of the draw.
Now should the new wind sensor not work, the ask for a new ISS (the transmitter and antenna) it is under warranty. Ask Davis to send you the new one and on getting it you will send the broken.
OR fiddle with it for another year and when the warranty runs out, you can buy it.