B&B Electronics SL2736-698 - Quick Start Guide - Manual (Page 3)

STEP 1: Attach Cable (Standard S-I/O only)
If using the standard version of the Serial I/O Card, with removable cable,
attach the cable to the card.
Press the side latches of the cable connector, insert the connector into the
bottom of the card, and release.
The card and cable should join snugly and remain attached after you release
the side latches. To remove the cable, press the side latches and pull gently
away.
Important! Do not just pull on the cable to remove it from the card. If you
pull on the cable without first pressing the side latches, you can damage
the connector and card!