It really will depend on the installer, you don’t say if your current service is delivered overhead or underground, but the external cable ( dropwire from a pole or underground from a duct ) will need to be terminated on a CSP externally and at a low level, then a different ( internal ) cable ran to the location of the ONT….it’s possible that what you provided in the way of easing the installation process may be used, or may be impractical and not used…AFAIK , OR don’t use field fit connectors any more , so the ‘internal’ cable will already have a SC/APC connector on it ,( the end that plugs into the ONT, ) it’s the end of the internal cable at the CSP that is cut to length and spliced to the external cable at the CSP, tying the connector to a draw cord and pulling it through a wall space may not do it any good and could be rejected by the installer, but until they actually turn up , we ( and you ) can only speculate.
On new builds , the developer runs the internal cable between the ONT location and external wall, the cable coiled in an electrical back box , and OR fit the ONT inside a housing that is designed to fit using the back box screws , with retro fit installs , the ONT is simply attached to the wall ( not using an ONT cover )
