If it's a UK spec TC with single circuit plus servo then.....
Out of the master cylinder, turn left (RHD) and through a hole in the front of the T section on the chassis. Tubing goes down inside the central spine to the rear, exits through the closing plate just in front of the Y split and goes inside the chassis leg to the servo.
Out from the servo and down to a multi-way connection on the chassis leg. On mine this was a 5-way junction as follows;
1. Inlet from servo
2. Brake light switch
3. front brakes
4. RH rear brake
5. LH rear brake.
The front brake line goes back through the central spine and out the front where it splits into a 3 way connection mounted on the chassis with one for each front caliper.
The rear lines go along the chassis legs and to the flexible hoses on the suspension arms, then short lengths along the arms to the rear drums.
I don't think there's a good diagram, the S2 manual shows the arrangement as does the parts lists for all models. I'd say the S2 is the best you'll get unless someone has gone to the trouble of drawing it out.
Brian