Dell PowerEdge C8220X Hardware Owner's Manual page 219

If applicable, release the cables from the retaining clips on the sled
e
cover.
Press down the cable-locking tabs and disconnect the power cables
f
from the back GPGPU card. See Figure 3-54.
Figure 3-54. Removing and Installing the Back GPGPU Card Cables
1 power cable's cable-locking tabs (2)
2
2 power cables (2)
Installing System Components
1
219