Sun Microsystems SPARC Series Service Manual page 21

Caution – When removing a cable such as the LAN cable, if your fingers do not
reach the latch lock of the connecter, use a flat head screwdriver to push the latch to
disconnect the cable. If you forcibly insert your fingers into the service clearance, the
LAN port of the motherboard unit of PCI Express (PCIe) cards may be damaged.
Chapter 1 Safety Precautions for Maintenance 1-5