For my coastal paths I have some wend their way off and on along the back, with the odd path or track running down to a cove for landing actions. The only ones with a defined edge route are for those which have to always be adjacent like the ones expanding to fit the harbour sections or where they fit in with a fortification. As mine go up to the backboard I don't join them with anything at their ends. The exception to this is for parts which obtrude into the playing area in more than one piece, where I put a removable dowel in the ends with a hole in the adjoining piece.
Rob.