Porsche 930 Turbo. A question regarding steam wheel and WLS

Hello Porsche Community, I am interested in the Porsche 930 Turbo and have a few questions about this. At the Techno Classica in Essen I looked at various 930 Turbo and asked myself the following question: There were models that had mounted a steam wheel in the front of the center console (quasi already almost under the armarur board). At least I thought the rotary controller was correct, if it is none. Other models, on the other hand, had d My question is now, is this variation dependent on the engine (3.0L and 3.3L) or does that have another reason? My second question is whether there was the possibility of one or even more WLS for both variants. Thank you for the answers Best regards Peter