Connecting the socket card is done in the same way as the routing card. Make sure that the clips align with the white line outside the clip holes on the routing card, then mount the socket card. The white spot on the socket card should align with the one on the routing card. Press down the socket card (i.e., compress the spring-loaded connector on the socket card) and turn the clip 45 degrees in the clockwise direction until it aligns with the white line outside the clip hole. It is easiest to do two opposite clips before locking the last two.
Note: Always rotate the clips
within the 45 degrees window. Do not turn them around. That could cause the routing card
below to unlock from the clip.