Emax

Hello there, first post,

Just purchased an Emax SE rack, and couldn't find the answers to my first interrogations here. Besides the manual seems to assume one understands many "basics" that maybe I do not.

the back sticker says Model 2120 and the unit bears a blue SCSI connector on the right of the outputs. Well it's a DB-25 connector but there's no scripted "SCSI" on the back Panel. It does seem to have always been there though. On the inside board, the port is conected to "CN1"
Does all that make it a Plus version?

If it is, I'm a bit confused because this one came with a IDE ZIP 100 Drive, enclosed in an external case with power supply, that is connected through a flat scsi ribbon cable, going straight to the inside CN2 connector by the interstice a the base of the enclosure, thus avoiding the scary slot building operation described in the emulator archive website.
So, If the Emax has a built in ext SCSI connected to CN1, how comme the user decided to go for a more complicated procedure while he could have connected a regular external zip drive to that blue connector?
I can't believe that it is only because this was the only zip drive he had for exemple...
If I get a regular external zip drive, will it work on the supposedly factory scsi connector?

Now for the second problem.
The emax boots without a problem from the zip drive with the already loaded ZIPs I got and so far I can listen to the sound and edit them. On the other hand it doesn't seem to notice the also loaded floppy disks I insert in the regular drive, which I guess can be a real problem if I wich to use a different OS or more importantly format new disks/ZIPs.
I tried with the emax already booted, with the ZIP drive turned off, with the zip drive completely disconnected (in case you can't use both at the same time)... The only thing the emax says is "diagnostics" for a few seconds when turned on without the zip, then gets stuck on  "loading software" in all cases. Wether I try to insert a disk or remove a disk, nothing changes (though I can hear the floppy drive turn).

Any Idea on that as well?
Hope you can help
Thanks

Jeremie