Lenovo THINKSERVER 3797 - Manual (Page 174)

The following illustration shows the internal routing for the configuration cable (3
backplane connectors)
1 .
The following illustrations show the internal routing for the SAS hard disk drive
backplane cables.
1 DIMM air baffle
2 SAS expander card
3 New backplane
166 ThinkServer RD220 Types 3729, 3779, 3797, and 3798: Hardware Maintenance Manual