if the system has allowed quick start then there has been a VM install there in the past
start outside and look for the external wall box - 6" square ish usually on wall facing road or pavement - brown or grey usually - follow any cables that come from it and go inside - if there are non look inside opposite external box as they may just have drilled through wall - as said it may just be a cable rather than an internal wall box
VM will pick the thread up but than can take a while - maybe a week so the phone is your beat option
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Tony