Just bolting it through the deck is not likely to be of sufficient strength - in really nasty weather it would likely pull your deck up. My boat came with a factory fitted inner forestay and storm staysail. It consists of a very large U-bolt that goes through the deck and attaches to a massive chainplate mounted on the partial bulkhead aft of the sail locker and bolted through into the cabin (and there covered up with a piece of teak trim). At the top it exits at just such a blank deck area as you describe.
So on your B36 that is very likely what [img=http://newimages.yachtworld.com/resize/1/3/27/5400327_20150930011552031_1_XLARGE.jpg]http://that blank area[/img] is for, as it looks in the right place to fit the chainplate on the anchor locker bulkhead, which is really the only place it can be mounted that has sufficient strength.
The top of the stay goes just below the forestay to avoid needing running backstays to stabilize the mast against forward pull like you would have on a true cutter rig. This method is documented by Selden for masthead rigs only, but not for the 7/8th fractional rigs Bavaria has. It seems to work so though, although I've not flown it in anger yet.
The sail is packed up ready to launch as easily as possible (flaked and sail-tied with the sheets attached instead of neatly stowed away - in the sort of weather it comes into use I'd like to spend as little time as possible on the foredeck). There's a snapshackle on the halyard and one on the tack of the sail so it can be attached and raised quickly. The halyard goes through a rope clutch on the mast - you don't really need a winch to pull it up and tighten it, but you do want a cleat on the mast to make it off after the rope clutch. The staysail sheets can run through the genoa cars if the genoa sheets are tied off to a cleat somewhere forward (I used a midships mooring cleat) and then dropped loosely while remaining in the cars (I hadn't yet figured that out in the photo below).
