Apple Power Macintosh 4400 - Manual (Page 162)

Installing a DRAM DIMM
1 Push the ejector on the DRAM slot outward and down to open it.
Your socket may have one or two ejectors.
2 With the ejector in the open position, align the DRAM DIMM in the DRAM slots as shown.
IMPORTANT Do not touch the DIMM’s connectors. Handle the DIMM only by
the edges.
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