Accessing unknown sources file path

Hello everyone 

i'm using the oculus Go headset , and i want to open a game which i created with unity but open the game with only coding and in order to do that i need the game's file path ,  where it has been downloaded in the headset in this case in unknown sources , 

but i don't know how to get it ,

my question is does anybody knows the full file path of a file in unknown sources ,

it would really help me 

thanks in advance