It looks like you want the user to identify two cell elements. You want to draw a line in dynamics from the origin of the first cell located to the current point.
You are using a transient element in your dynamics logic, but I don't think you need to do that. Just create the line and draw it in dynamics. The cursor shown is the draw cursor.
It looks like you get, or can specify, the locate cursor when you don't start dynamics. When you start dynamics the purpose must be to draw something, so you get the draw cursor. I don't know if it's possible to both draw and get the locate cursor.