Lucky [censored], obviously has some of the old school extension kit sockets on board.
Now having to use a 'normal' NTE back box, and then fit and RJ45 front plate on it, just terminating the single pair on 4 and 5. The end that terminates by the NTE is
supposed to have an RJ11 fitted by the engineer, this then going in to the frontplate filter on the 'usual' hole. The reasoning being that the punters can then, if required, choose to plug the modem in direct, bypass the kit, if they wish, or to aid faulting. Remember, these kits, once installed, belong to the punter.
However, fitting the RJ11's is a fiddly PITA, terminating on the internal IDC's is much neater also ..... so.
As for the contractors fitting them ....... but that would take time, and a little skill, two things they seem short of, or loathe to dispense.