HubConnect is added to an rPi as a plugin to Homebridge. Homebridge runs as a NodeJS app on a variety of computers, including rPi. There are two Hubitat Plugin's of note, one uses the MakerAPI mechanism, the other uses the HubConnect mechanism. You could use the HubConnect version but I'd suggest using the HubConnect version when you already have HubConnect installed.
I've created a Hubitat focused Image for a rPi that includes Homebridge with BOTH plugins as well as Node-Red, with all the palettes commonly used for Hubitat.
