ok, to save you the f**king around later, hook kit up the same way as a internal one.. you have an electronic one?
line from MANIFOLD to boost controler -------> to wastgate lower half. top half of wastegate leave open to air.
hooking up the top half of the gate to the controler is another way but is harder to get a stable boost control without spikes etc etc...
ie: do not follow the "external wategate" hose routing that comes with you boost controler..