Lenovo THINKSERVER 3797 - Manual (Page 180)

The following illustration shows the locations of the adapter expansion slots from
the rear of the server.
1 PCI slot 1
2 PCI slot 2
3 PCI slot 3
4 PCI slot 4
To install an adapter, complete the following steps.
1 Adapter
2 Expansion-slot cover
3 PCI riser-card assembly
1. Install the adapter in the expansion slot.
a. If the adapter is a full-length adapter for the upper expansion slot (1 or 3) in
the riser card, remove the full-length-adapter bracket 1 from underneath
the top of the riser-card assembly and insert it in the two openings 2 in
the end of the upper expansion slot of the riser-card assembly.
b. Press the bracket tab 3 and slide the bracket to the right until it clicks into
place.
c. Align the adapter with the PCI connector on the riser card and the guide on
the external end of the riser-card assembly.
d. Press the adapter firmly into the PCI connector on the riser card.
172 ThinkServer RD220 Types 3729, 3779, 3797, and 3798: Hardware Maintenance Manual