Pitney Bowes SendPro C Operator's Manual page 97

Maintenance
11. Examine the printhead holder and find the location of the lower printhead alignment slots.
12. Insert the printhead by squeezing the tabs on either side of the printhead and sliding the plastic
alignment pins into the lower slot of the printhead holder.
13. Gently push the printhead into place until it snaps into position.
Pitney Bowes Operator Guide February 2021 97