1991 mustang t5 to c4 swap ?

i have a 91 mustang and i swapped out the t5 for a c4. i bought a b&m prostick shifter that comes with a neutral saftey switch. my problem is that i dont know how it hooks up. i took a aod plug for the clutch switch and the car will start in all gears and i dont know where the two wires go from the shifter neutral safety switch to the car wiring harness. on the the shifter neutral saftey switch there are two prongs. one says com. and the other ones says on. how do they hook up. thanks joey