Fit third SATA HDD to DELL Dimension 9200

I have two separate SATA Hard drives which now operate independently (Raid 0 stripe disabled)
Will the motherboard support a third SATA HDD -
Other existing SATA devices are :one DVD DRIVE
and one CD DRIVE. On the motherboard I can see what appears to be two spare SATA plug sockets.
Can anyone assist ?

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