Problem with flash N7505


I am a new user of z3x. I would like to flash N7505, I downloaded the flash, the file behaves 4files starting with AP, BL, PC and CSC but I don’t really know where put them. I have version 20.5 thank you to clarify how I can flash it.
the mobile is rooted and is in debuging usb mode.

I do not master English is just the translation google translation.