Hello Niku,
It seems in your case you have only one FTP, and the system is pointing by default to that FTP and picking the required files fro your Info Package.
Normally a Standard ABAP Program RSFTP002 is used to communicate to the FTP Server with the help of RFC . In the Same program you can maintain the credentials ( USerName and password) along with the Source and Destination related properties .
Back to your query , you can check the same in above program ( RSFTP002 ) through SE38 and cross verify your FTP .
Hope this helps !
Regards
YN