Zac67 : you are correct, it is some kind of ISA connector, just tried to squeez an old ISA soundcard in it and part of the card fits perfectly inside that slot on the Amiga card. The Amiga card on the back has got NO connector, just an on and off switch and one single red led, that's it, no scsi connector, no svhs connector, no connector at all.
So if I get this, it's an ALF card that is made to use pc isa scsi cards that all together are not bootable ? So without a specific pc isa scsi card this Amiga card is useless ?