I've found all kinds of led light install videos on YT but none that really stepped me through the process. The Flashforge Wiki is solid, but figured I'd drop the steps I used and a couple small things I changed up in the process. My AD5X does have a the FlashForge Camera kit and now the led light bar mod as well.
The LED Light bar was sourced from Amazon. If I remember correctly I believe it was $18. Named: "Official Original Flashforge Adventurer 5M Pro 3D Printer LED Light"
LED Light:
https://www.amazon.com/dp/B0DGFPVH34?ref=ppx_pop_mob_ap_share
3D Printed LED Mount
https://wiki.flashforge.com/resource/pictures/ad5x_picture/ad5x_in_action/led_strip_onto_the_mounting_plate.rar
