Colorful C.H110M-K D3 PLUS V20 User Manual page 6

2.7.2.ATX power connectors (24-pin ATXPWR, 4-pin ATX12V)
These connectors are for an ATX power supply. The plugs from the power supply are designed to fit these connectors in
only one orientation. Find the proper orientation and push down firmly until the connectors completely fit.
2.7.3.Serial ATA 3.0 6Gb/s connectors (7-pin)
These connectors connect to Serial ATA 3.0 6Gb/s hard disk drives and optical drives via Serial ATA 3.0 6Gb/s signal
cables.
2.7.4.Back Panel IO Connector