Ring Wired, bypass chime on GROTHE 196 TR

Really struggling to set my ring wired doorbell up, physically it's installed on door frame, fuse box is off for doorbell.When I take the cover off my chime, there are three wires, labelled as 1, 2 & 3.Every instruction I've found is for F, R &T.Where does the jumper cable go?It looks like a very thin wire goes from the terminals in 2 & 3 into the solenoid that strikes the chime bars.The terminals 1 & 2 have a wire going into them. 1 is blue and white, 2 is red and white.Not sure where the jumper cable goes!