Define a multi-level terminal by assigning appropriate properties.
Modify terminal properties
Levels: 3
Level 1
Level Description: Top
Wires Per Connection: 2
PinL: 1
PinR: 2
Level 2
Level Description: Middle
Wires Per Connection: 2
PinL: 3
PinR: 4
Level 3
Level Description: Bottom
Wires Per Connection: 2
PinL: 5
PinR: 6
Click OK.
Notice on the Insert/Edit Terminal Symbol dialog box, Properties/Associations section that the block now has three levels. Terminal 4 is assigned to the top level of the block.