FM in eCATT

Hi all

I am programming ABAP in eCATT. I have plant and Company code in Solution Manager from my log. Using these details, I need to find the Sales org from T001W that is available in the target system

For this I chose the Function Modules,

GET_TABLE_RFC,

TABLE_ENTRIES_GET_VIA_RFC,

RFC_GET_TABLE_ENTRIES

But I am not aware as how to use these function modules and get my requirement out of this. Please guide me

Thanks

Tharani