The adapter has two pcbs, one goes to the scsi port of the COSMOS EX device. The other side goes to the internal scsi connector of the Atari Falcon (three resistors must be desoldered and a rows of pins must be soldered on that part).
2 PCBS with connectors. (NEW VERSION)
3 single row pins.
Parts not included but needed.
A IDE bus cable is needed to connect the two boards.
Note: this is a work in progress board. It works very well and has been installed on severals machines, but you will need soldering skills and also some knowledgement to arrange the cables internally on the Atari Falcon.