Konica Minolta QMS magicolor CX Reference - Manual (Page 105)

Interface
Daughterboards
2-31 Printer Options
3 Attach the interface.
a Position the interface so the port slides into the opening you
just created.
b Snap the interface onto the connector and the plastic
standoff.
It’s okay to push down gently with your thumb positioned on
the interface right over the connector.