Yes, it is very simple. For example with the hybrid racing harness, the instruction say
1. For OBD II a vehicles using the K-Pro ECU: Connect A15 to A18 and then connect A12 to A16. Ground pins A9 and A10.
2. For OBD II a vehicles using the JDM ECU: Connect A12 to A16 and then connect A15 to A18. Ground pins A9, A10, and A16.
3. For OBD II b vehicles using the K-Pro ECU: Connect A6 to A18 and then connect A15 to B23. Ground pins B2 and B20.
4. For OBD II b vehicles using the JDM ECU: Connect A6 to A18 and then A30 to B23. Ground pins A15, B2 and B20.