The cable really isn't that much of a problem. Most likely you will be shooting on a tripod, manual everything anyway. The cable is just something that you have to detach and attach when you change a lens. Get a short cable and it won't be in your way.
The only practical effect is that the lens must have good sync contact. And if you are interested in slow speed the shutter must have correct slow speed (when doing 1sec to 1/30th exposure), and that it does noot shut down the sync signal in the middle of a B exposure and reopen it at the end. Regarding the last point, on long exposures, some (1980s-1990s?) Hassy lens were "optimized" to shut the sync signal off during the duration.
So avoid the C lens, and make sure you can return a lens, and you will have no problem. Actually, Hasselblad can probably fix the shutter and sync problem if needed be, so really not a problem at all.