Put tape on the 5V pin - Why and how

Was just wondering when I had to wire in the USB connecter to the mother board of the Qidi X plus which is very easy to do. The Guy in the youtube video said not to connect the 5V DuPont connecter on the mother board side maybe this was to stop some problems like this happening in the first place. Glad I did not connect it now. my best Daz

worked very well on my Ender 3v2 printer