SCSI floppy?
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Yes, it is a SCSI connection for this TEAC FD-235HS floppy drive. Teac is the manufacturer, FD is a floppy drive, 235 may be the series, H may be high density, and S should be SCSI. The connector is a 50-pin SCSI. This is a SCSI-1 3.5" floppy drive. 
Here are the specifications according to the TEAC FD-235HS-11 00 Micro Floppy Disk Drive Hardware Specification document:
Here are the specifications according to the TEAC FD-235HS-11 00 Micro Floppy Disk Drive Hardware Specification document:
Those drives are generally for PCs rather than Macs. Also, the SCSI version of this floppy drive is generally for industrial use. If it were to be run on a vintage Mac, drivers would be required, and I am unsure if there are any written for System 7, macOS 8, or even macOS 9.
Apple did not have any TEAC drives back then in the Macs. By 1998, Apple dropped floppy drives from Macs after Steve Jobs returned to Apple. Sony was the exclusive supplier of 3.5" floppy drives from the mid-1980s to sometime during the 1990s. By then, I noticed Panasonic and other 3.5" drives in the '040 and PowerPC Macs.
I have not seen a TEAC drive in a vintage Mac. However, it looks like there are TEAC 5.25" drives inside the Apple-branded external 5.25" drives for the Apple II series.
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There was a SCSI external enclosure called DaynaFILE back in the 1990s that one could have a SCSI 5.25" or 3.5" drive to a Mac.