Oh ok, couldn't figure it out as I never use them, so thanks for making things up clear@Jazz Forsberg - I think he means the RJ12-USB adaptor.
TP3As come with only the RJ12 connector as far as I know and that won't be compatible with the Fanatec wheel base. You'll need to get the RJ45-USB adaptor and plug your wheel and pedals in separately.
That'll work just fine if you're on PC, I'd be guessing if I told you that'll work on console.