When using the The Roadmaster Tow Dolly part # RM-2050-1 to tow your 2018 Fiat 500X behind your Thor Freedom Elite 24FE, the tow dolly will do the signaling, not the vehicle. Therefore you need a 7-way trailer connector for both the tow dolly and motorhome unless you already have them.
For the motorhome, I recommend using the Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector # C59236 with the Universal Installation Kit part # ETBC7. Since your motorhome is larger than... view full answer...