u/ConsciousParfait2049

The left hinge on my XM4 was cracked so i decided to a diy repair using a YouTube tutorial. I disconnected a yellow tab or what I assume is a sensor and now my headphones won’t turn on or charge. Does anyone know the exact name of the sensor or part I damaged? Also are my headphones repairable? I’ve accepted the fact that I should have just paid someone else to do it. Your help would be greatly appreciated.