So for a OBD0 ECU
It would be
From B19 to C13 and the other would be B19 to C12
Wire a 1k resistor from D10 to D20, and another 1k resistor from D10 to D22. The exact resistors values don't mater as long as they are the same and between 1k and 5k. e.g. you can use two 2.5k resistors.
some one tell me I'm right or wrong.......