I'm curious why a small cargo airline would even need to use the KCM system. If they don't fly passengers, then wouldn't their crew access the aircraft from the cargo ramp (with a SIDA badge) and never need to enter the passenger terminal/sterile area?
Get lucky and get an interline agreement with a larger pax-facing carrier? Sure no one is going to ride on your little cargo planes but your crew gets to fly on someone elses metal.