I don't do racing sims but with Train Sims I have used other accompanying software, and modlaunchers etc. in the past. I assume Simhub etc. are programs that launch the main game or run concurrently.

If you want to install it semi-manually, have you tried setting it up with Lutris? Set the wine prefix to be a folder insids your steam user folder steamapps/compatdata/[gameid]/pfx on the drive the racing game is installed. Other guides I found:

https://www.simhubdash.com/community-2/simhub-support/guide-simhub-on-linux/

https://github.com/srlemke/SimHub_on_Linux

If it's hardware connection issues, that's another whole beast