AS Heat Pump thermostat wiring

I am a DIY installing a new American Standard 3T heat pump/air handler model GAF2A0A36S. I am currently trying to hook up the low voltage control lines for the thermostat and heat pump. Per the “Air Handler Hook-up Diagram Heat Pump” there should be 7 pigtails for this attachment. Per the “Wiring Diagram for GAF2A0A36S Air Handlers”, there should be only 4 pigtails. My machine has only 4 wires WH, GR, RD & BL as shown on the wiring diagram.

Any ideas on how to wire this bad boy?
I appreciate any help available/provided.

Attached Images

  

AS Heat Pump thermostat wiring