We generally distinguish between the $s\to-\infty$ end, and the $s\to+\infty$ end. The main difference is the ordering of the Lagrangians at the intersection point. Here we are following the Joyce convention [41], which is opposite to Auroux [9]. This is dictated by compatibility with the degree formula (63). Similarly, later the $A_{\infty}$ product also requires the Lagrangian boundaries to be ordered clockwise, as opposed to the counterclockwise convention in Auroux [9].