I am always wary of the Touring Plans resort maps. Sometimes they are really wrong. I haven't looked at what they have for BWV.
I have never figured out the Touring Plans fax situation -- because I keep reading that the resorts don't even look at faxes, they just throw them away. So why do people report that they got what they wanted using this service? Either cast members read the faxes or they don't. Or do they only read the faxes from Touring Plans? Does Touring Plans have a different fax number to use? It's all a big mystery to me.
Anyway, I don't know what "Building 1" is. The resort is all one building.
Other people might pop in and provide assistance.
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https://www.disboards.com/threads/courtesy-of-shamus-bwv-villa-locations-by-view.2931467/
Online check-in is hit or miss. Sometimes you don't have any options to choose. Sometimes you have options which do not apply to your resort. Normally I would say to call in your room request, but obviously you can't do that because you are renting points. Only the member can call DVC.