are we supposed to call the POC (posting order)

are we supposed to contact the POC? I've been posted to OES as an ammo tech (combat) (basic) at kranji camp 3, (despite being combat fit, idk how also), and i have not yet been added to any gc or been told anything about booking in tmrw at 9 am. soo was I supposed to call them up to acknowledge it or smth?