run a 22-12 multi to kp. you have 4 conductors for keybus, 2 for power devices, 2 for circuit, that leaves 4 conductor to either series in zones or split up. make your splice or junction behinf kp in a 2 gang. everyhting color coded and pairs for service (rbgw-KP, or/br-motion power, bl/yel for circuit, tan/grey-drs, pink/purp -drs.... now everything is dedicated back to panel and seperate at same time. def make it partition 2.

run all your zones to kp

run a 18-2 for a horn over there....