I already have Metz 45 CL-4 and have used it with PC-sync. Now I got a some kind of TTL adapter for Nikon. Despite of googling, I haven't figured out how to use it.

The adapter is SCA 346/2 AF M4 with 300A cord.

One thing is the settings. The adapter itself has M - A - TTL -switch, as does flash unit also. So what is the right combination for switches?
Another thing that I wonder if that is there a lot of difference between revision (which the M4 indicates, I guess). The documentation (ie. compatibility chart) on the Metz's site doesn't even mention SCA 346/2 AF M4, only M1, M2 and M3 are included.

So.. How to use this with different Nikons? I have F100, F90X, F601, F301, FE-2...