The nominated park is not negotiable
Shipping lines nominate which empty container park a box goes back to, and that nomination can change at short notice. Brisbane parks are spread through Lytton, Hemmant, Wynnum, Pinkenba and out to Acacia Ridge, so a redirection is not a minor detour — it can add most of an hour each way.
Send the dehire reference and the nominated park with the booking. If the line redirects, tell your carrier immediately so the slot can be rebooked rather than the truck turned away at the gate.