... open a new topic and discuss it there if this doesn't make sense. please don't hijack threads like this in the future.
Step 1: setup game list. Choose the folder with your 3ds games in it.
Step 2: right click the game and choose open save data location.
Step 3: it should open a explorer window to a path like "C:\Users\username\AppData\Roaming\Citra\sdmc\Nintendo 3DS\00000000000000000000000000000000\00000000000000000000000000000000\title\00040000\00175e00\data\00000001"
Step 4: put your save file named "main" there
If you need further assistance, please open a new topic about it.