Help required - 4 LNB DiSEqC configuration -

Dear professionals, good morning !

Here is what I have:
>> Xtrend ET-6500 running OpenVix 3.0.808
>> 4 LNB Diseqc Switch.
>> 3 installed dishes as following :
1st fixed on Nilesat 7°W,
2nd fixed on Astra 2A/2E/2F 28°E,
3rd works with a Satellite Actuator (Motor) and adjusted for both : Hotbird 13°E & Astra 19°E

Here is what I want :
I want to configure the receiver to work with the 3 dishes, with the 3rd one moves to receives two satellites.
And here is how cables are plugged in the Diseqc Switch :
Nilesat 7°W ............................. is received by dish 1 and is connected in LNB 1
Astra 2A/2E/2F 28°E ................ is received by dish 2 and is connected in LNB 4
Hotbird 13°E & Astra 19°E ........ are received by dish 3 and are connected to LNB 2

To make all this work, how to configure my LNB settings ?

Let me know if I need to supply additional information,
Thanks by advance.

Thanks for all your answers and suggestions !

I want to use 3 dishes because I am from Morocco, and we barely can receiver Astra 29°E, Plus I would like to get Hotbird 13°E and Astra 19°E, PLUS, Nilesat 7°W is official satellite in my country.

That's why I had to use this config.
And IT IS SOLVED, I just configured every LNB as following :

Diseqc version 1.0
LNB 1 >> AA
LNB 2 >> AB
LNB 3 >> BA
LNB 4 >> BB

Simply :))))