If you pull that hose off, you will see a nub coming out of the valve cover. That is where you want to mount the small breather. It only sticks up a couple inches so doesn't affect anything. I'll see if I can get a pix later.
Also, a friend on GRRRR8 board is making similar breathers into oil caps. While they don't fit the EB engine, it would be easy to modify our cap and install the breather on top of it, like he did with the G8 oil cap. He sells them for $45. and is selling the b'jesus out of them! Might become a winter project for me!