Actually I think the entrance is the opposite side, there is that land cliff protruding a bit inwards to the right of the CGI image of Accordo which falls in line with that protrusion on the map which would be on the top of that map, which would make the entrance the side facing the right, it also might make more sense this way because in the distance of the Accordo CGI you can see it's very flat and there is no hills or cliffs,it's open water, if the entrance was from the left open water side then in the CGI shot we should be seeing some land all around the back, but it's all flat just like the open water side towards the left of the map.
Also on the right side you can sort of make out a credence shape in the shape of the frontmost waterfall with that structure too.
So that water bridge would be coming out from a part of land on the right and connecting to that structure, and being a bridge it also makes more sense to be like that.
Of course I could be wrong.