need help setting up tvheadend with hdhomerun prime

trying to setup tvheadend 4.2 but having some problems. im using the setup wizard and everything is good till i get to the pre-defined muxes. im using a hdhomeurn prime so thats DVB-C network but the only pre-defined muxes its showing me is for countries in europe and im in the US. so all my scan results are failed. if i use the hdhomerun addon i get live tv.