NTRIP caster is used by the base, NTRIP client is used by the rover. As previously mentioned and Intuicom X is a great solution but it sounds like it’s not in the budget.

The cable will be available from a Trimble dealer, Ag Express, or a precision Ag tech who can. Uild you one.

If you want to go cheap, and android tablet on cellular with Lance Lefebure’s app and a Parani Bluetooth to serial adapter works.