Good morning to all responding to this post.

The purpose of an "end of line resistor" is to supervise the loop. What you are working on here is fine but the supervision resistor needs to go between the ground point and the switch. This way if the wiring to the switch gets scraped while installing or the staple goes thru the cable and shorts out the contact it will be detected properly. Most modern day systems use either 1K or 2.2K resistors as the EOLR. A few use 1.5K.

BobK (31 years as alarm installer)