Dell Precision T5400 (Late 2007) - Manual (Page 170)

170 Adding and Replacing Parts
DC Power Connectors P2
Pin Number Signal Name 18-AWG Wire
1 12 VC Blue/White
2 12 VC Blue/White
3 COM Black
4 COM Black
5 12 VA Yellow
6 12 VA Yellow
7 COM Black
8 COM Black
9 12 VB White
10 12 VB White
11 12 VC Blue/White
12 COM Black
13 COM Black
14 COM Black
15 12 VA Yellow
16 COM Black
17 COM Black
18 COM Black
19 12 VB White
20 OPEN
7 8 9 10 1 2 3 4 5 6
67 68 69 20 11 12 13 14 15 66