I cannot assign the keys on the Boeing 737 Thrust lever

Can I control the buttons I share below separately without FSUIPC? It needs to assign 6 different keys. Can this be done? If it can be done please tell me which keys I should assign because I don’t know. (I have a PMDG 737 airplane.)

-Left A/T Disengage
-Right A/T Disengage
-Left TO/GA
-Right TO/GA
-Left Reverse
-Right Reverse