MacDon FD75 OM - Manual (Page 233)

HEADER ATTACHMENT/DETACHMENT
9. Connect electrical connector to combine at (A).
Figure 5.73: Combine Couplers
10. Replace cover (A) on adapter receptacle.
Figure 5.74: Adapter Receptacles
11. Lift lever (A), and pull and lower handle (B) to
disengage feeder house/adapter lock (C).
Figure 5.75: Feeder House Locks
169894 219 Revision A