Lenovo ThinkStation P7 Manual page 13

The third onboard M.2 kit consists of the vertical holder w/ interposer card and the
M.2 carrier, as seen in the following photos.
1. The M.2 carrier itself is identical to the one used for the onboard M.2 drives,
so please follow the installation instructions from the previous section to
install the M.2 drive and heatsink into the carrier and then the carrier into the
vertical holder.
2. On the rear of the vertical holder, you will find a couple of mounting tabs:
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