Hardware Left Joycon Motherboard upside down

[Pablickastle]

Hi! just like the title says

i bought a left motherboard for my dead left joycon.... so i installed, everything is just fine, but when i finish, i noticed that the leds doesn't turn on... i put the new repaired joycon on my switch and nothing happened, but then, just for mere curiosity... i put the joycon on the RIGHT side of the switch and BAM... it detected like a right joycon.... but is a left one! i didn't know thats even posible xd so now i have a left joycon with a right motherboard flash writed on it and a completely normal right joycon xd

anyone knows how to change that?

Thanks in advance :3