fit it to the manifold if you havent got the connector on the throttle body hose, the best place is the throttle body hose imo, you could try using a one way valve on your servo hose and hook up the vacuum to the adaptor on that
without a vacuum will cause your car to overfuel at idle and the mixture will lower down as the higher up the rev range you get, basically the fuel pressure is at max all times, you will notice a nice increase in acceleration from idle but you will also notice a drop in mpg
look at the fpr mod in the tuning section, i done a bit of work on it