No - it's facing PH, it just looks that way because the back side has an opening too. I've been hit pretty hard a few times lately and the bunker almost saved me each time
I agree the bunker is the right way around in this construction. But the mortar is pretty exposed, maybe swap the two cannons on the sides of your PH with the gold and grog storages next to the mortar. That way protecting your best defense attribute
I'd just say throw you pirate hall outside. Start farming and forget trophies! Just my opinion though.