Viper 791xv and 508D

I have done a search and think i understand but i just want to make sure. I have the 791 installed with 530T for the windows. I was looking in the manual and it says that i can connect the blue and green wires from the 508d and connect them to the green wire from the shock sensor without diode isolating them. I understand that first i must cut the green wire and hook the end from the sensor up to the blue wire coming from out the sensor and the other end from the green plug is the one i use for the already twisted green and blue from the 508D. Could anyone please tell me if this is correct. Also is this a good way of doing it or will there be problems. I thank you all very much for your help in advance.

Any help here? I think i can explain a little better if that is the problem. Dont know if this would help but i checked the shock sensor and found the green wire cut and looped back into the sensors blue wire? Anyone? Just wondering if i can track the cut green wire back to the 791 that was supposed to be hooked up to the sensor and just use it coming out from the connector and hook the 2 wires from the motion sensor to that green wire without diode isolating them. Thanks in advance.