As no one answered, and despite I don't own a motorised dish, I think there are only two possibilities (but it would have been easier if you had also specified the satellites you get from the fixed dishes and which ports the switch are connected to... Anyway... ).
Let's suppose the tow fixed dishes are for 13E and 19,2E;
suppose also the Input 1 of the switch is connected to the motor, Input 2 to 13E and Input 3 to 19,2 (otherwise, change this example according to your system; but next time be precise and provide us with ALL the needed infos).
So, there are (in my opinion) only two ways. In both you need to use the Advanced configuration in tuner Setup, not simple
1st way: using DiSEqC 1.2 for every LNBs configured
Motorised dish on Input 1
Configuration mode: Advanced
LNB1 set as it is (Universal or SCR)
DiSEqC MODE: 1.2
DiSEqC 1.0 command: AA (or Port A if you use OpenBH)
Use USALS for this SAT: yes
and then the motor settings you must know and set.
LNB2 - 13E
DiSEqC MODE: 1.2
DiSEqC 1.0 command: AB (or Port B if you use OpenBH)
Use USALS for this SAT: no
-
LNB3 - 19,2E
DiSEqC MODE: 1.2
DiSEqC 1.0 command: BA (or Port C if you use OpenBH)
Use USALS for this SAT: no
2nd way: using DiSEqC 1.2 only for the LNB1 and 1.0 for the fixed dishes, with the same settings as of case 1. That is:
Motorised dish on Input 1
Configuration mode: Advanced
LNB1 set as it is (Universal or SCR)
DiSEqC MODE: 1.2
DiSEqC 1.0 command: AA (or Port A if you use OpenBH)
Use USALS for this SAT: yes
and then the motor settings you must know and set.
LNB2 - 13E
DiSEqC MODE: 1.0
DiSEqC 1.0 command: AB (or Port B if you use OpenBH)
Use USALS for this SAT: no
-
LNB3 - 19,2E
DiSEqC MODE: 1.0
DiSEqC 1.0 command: BA (or Port C if you use OpenBH)
Use USALS for this SAT: no