Nbn connection box

Level 2
Hello I’m in the process of connecting to a tpg nbn plan. I’m just waiting for the modem to be sent. Well while I’m waiting I’ve been reading that I need a nbn connection box to be able to be connected. We just moved in to this premises about 2 months ago & the last couple days been looking everywhere but still can’t find a nbn connection box. I’m assuming the previous occupants took it with them when they moved out. So bottom line is , what do I do from here that I can’t find a nbn connection box. Please help