Speed signal in CTR ?

Hello, so, after a long time again a question from me. Can someone please tell me where I can pick up the speed signal (preferably not in the engine compartment). Is there certainly any pin on the control unit. Maybe also someone which kind of signal is this Or does someone generally have the occupancy of the control unit or does there ever such a general electrical plan from the CTR? In the past there were these “do yourself” books, there was always the wiring from the car, but with the mass of electrics today they probably gave it up 🙂 Wouldn’t be really great if someone had something for me love greetings, daTOM