This must be one of the first XA1541 cables ever made. It's also the cable I use myself most of the time since it handles several disk drives connected at once without problems.
This cable serves both as XP1541 and XP1571. On the other end there's a DB15 plug which plugs into disk drive. It is connected between the PC parallel port and the XA/XM1541
Both cables connected to skua, my primary Linux box.