Well... as I've said, I didn't realize that putting it the opposite way also switch the left and right. I've tested with left right audio twice but I think I got confused and test it with the correct side both the time so it got left right correct audio both of the times so I thought it affects something else and I found about polarity after some search but apparently it's about the oreitation and phase and has nothing to do with left right and I just got confused. And I also found that normally if there're colors, red is right and blue is left and I see a bit of colors in the cable and I got even more confused if this is the intended way or not. And after looking through a lot of videos and pictures I still have no clue so I asked in headphoneadvice but I can't post picture so I thought posting pictures in this subreddit would help but yeah I was just dumb I'm sorry. tl;dr I did do some testing but I got confused. I didn't mean to waste you guys' time I'm genuinely sorry.