Perimeter Microwave Sensor Question.

I don't have a convertible so I am not sure if I even really need a perimeter sensor but I may just for the heck of it. My alarm has a 3 pin input that it says can but used for a ultrasonic, microwave or glass breakage sensor. The only perimeter sensors that I find have four wire leads to them:

black------->gorund

green------->exterior trigger

blue------->interior trigger

red------->12V+

the wire diagram for my alarm doesn't show what the sensor input pins are so how would i install this. I mean if the sensor has a 4 pin lead put my alarm input is only accepts a 3 pin lead. Does this mean that i can only use a single stage sensor with this input? i Mean do i just connect the negative, positive and interior trigger to a 3 pin lead and hook it intop the alram. OR I do have a dual stage stage shock sensor with 4 wires blue, white, black, red i am pretty sure that i can splice the blue and white wires and hook in the green and blue from the perimeter sensor to one of each but have to figure out which is the pre warning and the full trigger leads. I have a Stingpro dx710 alarm http://www.stingpro.com/category8.htm I would appreciate any help someone can give me. Also if anyone has a sensor hooked up how well do they work and are they worth getting if i dont have a convertible but have a habit of leaving my windows down. Thank you so much

Ok Red wire goes to a constant 12v+ source

Black will go to youre Negative when armed out (diode isolate it if youre using it for starter/ignigion kill...cut the wire, attach the black lead to the alarm side, then diode with band facing the alarm, and then the wire for the starter kill on the other side)

Green and blue wires will tap into the shock sensor wires, or your alarm should have inputs for and aux. sensor.

Good luck