NBN Connection Box

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Level 1a
Hi TPG
I have recently signed up for an NBN plan and received my new modem. However, I do not have an NBN Connection Box so I am unable to install the modem.
I have recently moved in this property and there is a connection port on the wall but I think the previous tenants may have taken the Connection Box with them. Could you please advice on how I could acquire an NBN Connection Box?

Thank you. Lorena😊