Thank you all very much for your advices.
Today I recieved my Suzi 4 from the seller, tried to put it directly onto the transom of my boat and found one towing eye is sitting where the aux' bracket has to be.
No Problem i'll find a solution for that, but place isn't very much beside my Suzi Dt 55 main engine (+ my old teleflex steering), and also my sonar sounder is disturbing, but------nevermind.
If it's possible I' ll mount the aux without that extra plate directly on transom and try here in the River (Rhine, big+shallow& dangerous) how it all works together.
Paintman: exactly that one I bought, but with normal shaft. Nice engine.
Spartacus: Is that a teleflex steerbord on your Twatso, too?