Electronic Alarms and Home Security Devices - Adding Motion Detector & Glass Break Sensor to DSC 1500

I have a builder installed DSC 1500 will all doors and windows switched. I would like to add a DSC Motion Dectector and Glass Break Sensor to the set up. I managed to find the parts on ebay, but the instructions are limited. How hard is it to add theses to devices? is it as simple as adding both devices in parallel into the same zone on the keypad? ( I believe zone 1 is not being used). I have good but limited understanding of electronics (install car stereo's, car alarms, re-wired baot ac/dc system, etc..) Mark

You run a 4 conductor cable from the panel to the device location(s). 2 of them (usually red/black) go to the + and - power terminals on the device. The other two go to the normally closed contect terminals (many such devices only have the one set of terminals). Ignore the tamper terminals (if any) unless it's really a concern.

Assuming that you are intending for the two devices to share a zone input, connect one contact wire from each set together, putting both contacts in series (crimp connectors are best for this) One of the other two remaining wires will get the resistor if the panel is set to need them (it can be put out at one of the devices, again if tampering is an issue). Connect the free end of the resistor to the zone terminal, and the other free wire to the zone common.

Connect both sets of power wires to the AUX + and - terminals. Once they warm up, the zone should close. The next step after that is programming the zone as an interior zone.