Location and size of binding posts on Pi 2 Towers?


While I wait for my kits, I am having the wood cut for me (I live in a tiny apartment - no wood shop room).
2 questions:
1. Are the drivers surface mounted or do they need to be recessed?
2. Exactly how big is the hole on the back for the binding posts - the carpenter is doing all the cutting for me - and where on the back panel does it go? High, low, anywhere I want it?
Thanks
Jeff


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