AFAICT, the 68k port uses the classic mount mechanism via mountfiles and/or DOSDrivers mount path while the new SMB2/3 support for MorphOS will be more or less a drop-in replacement for the old smbfs command and have a compatible way to launch it, so even if you manage to get the 68K version working, it is calling for trouble once you want to return to the native support in the forthcoming MorphOS update.
So if you want to try it, do whatever floats your boat but be aware that it is definitely a stopgap solution only and might cause headache once you update your system.