05H3834 is an IBM part number for a SCSI interposer which was only needed for the old tape/disk controller card feature card #6501. It is a passthrough type connector, with male pins on one side and female pin receptacles on the other side.
The interposer was needed because the pins on the SCSI cables did not make proper physical contact with the #6501 card. As seen in the images below, the interposer has longer male pins than the standard length, as seen on a 61G8324 terminator for comparison.
- User:MrDolomite's personal discussion with an IBM CE on January 13, 2009.