High-pitched buzzing/whining sound from keyboard area on TUF A15 FA507

Hello everyone,

I’m looking for some advice regarding my ASUS TUF Gaming A15 (FA507RM). Recently, I’ve started noticing a strange high-pitched whistling or ringing sound coming from the laptop whenever it's under heavy load (e.g., while gaming).

At first, I thought it was the fans, but after listening closely, the sound seems to be coming from underneath the keyboard, not the fan vents. Interestingly, the pitch and tone of the sound change if I wiggle or slightly pull on the power connector.
Thanks in advance!