Potato Berries and Bat Houses

So, turns out that potato berries are actually the seed pods of potatoes, and that if you are truly DIY and punk rock you can grow potatoes from SEED you save yourself from these berries, as explained here. (also, OMG what an awesome blog! so glad I found her even if she stopped blogging last year)
I don't think I am that punk rock, but it's good to know.
Now, on to the dilemma of where to put my bat house. It has to be fourteen feet off the ground. I obviously want it near the garden (for pollination and mosquito control) but I don't want it to be too noticeable because our neighbors already think we're weird--don't want to have to explain why I am inviting bats to my homestead. Yes, I should relish the opportunity to demystify bats. But I have to admit I don't really relish it.
Anyhow, so it seems that erecting a pole specifically for the bat house would call too much attention to it. I'd nail it to the black walnut tree but right now it is covered in poison ivy and I am totally afraid of poison ivy. So, it should probably be attached to the house. I don't want it too near a window because as much as I LOVELOVELOVE bats, I don't want any accidentally flying in a window and having babies that can't get out until the spring. So, I was looking at the house today and for the first time ever noticed this:

I don't know what those pieces of wood are actually about but they seem to be the exact dimensions of the bat house and dang it, there goes that magical garden luck again. I'll report back when the bat house has arrived.