Someone correct me if I'm wrong, but I think the "WS" he has circled indicates Weather Station, NOT the outdoor wind unit. That is indicated with the WI on the far right. I wouldn't go taking the wind unit apart until we are 100% sure. I used to have the exact station you have. Toss it. Get a Davis Vantage Pro. Much more accurate, reliable and it catches your wind gusts much more reliably.
Don in Ohio