It almost sounds like they meant a physical connection with a coax cable, e.g. to a dish. To make the service work, they need the Id of the satellite receiver in the coach so they can activate it. But that raises some tech questions and I suspect they prefer to have an experienced satellite tv tech to sort it out rather than an amateur.
The first question is whether you have a receiver in the coach already, and, if so, is it compatible with Bell service. If you don't have a Bell-compatible receive, you need to get one (probably from Bell, but maybe the one from your house can be used).
Next question is about the satellite dome itself. It will be set up to receive from some specific satellite. If that set-up was for Direct TV or Dish, it will have to be re-configured for Bell Aliant satellites. Depending on the dome model & age, that may be simple or difficult.
Residential satellite tv techs rarely have the training to work on mobile systems and most of them won't even attempt it, so you may need help from an RV specialist. Try an RV dealer that handles mobile satellite tv equipment. And when you talk to Bell, ask to be connected to a rep who handles mobile satellite for RVs. The regular reps rarely know about RV satellite configuration (and thus the vague advice you got from them).
