Hi Arf
There is a clue in the name, End of Line, the resistors should go at the end of every circuit. The panel is looking for a resistance coming back on the circuit, one resistance for open circuit and a different resistance for closed circuit. Its to stop potential sabotage of the system whilst its in day mode, i.e system disarmed someone comes along and cuts the wire or shorts the wire, thinking that the system will still arm but wont go off when they break in when the system is armed. Of course as soon as they tamper with the wire the system will activate armed or not.