How to find which is positive?

Posted by ConsiderationGood616@reddit | buildapc | View on Reddit | 2 comments

Power Sw cover dropped from the cable and now in unsure which way around to put it back 😅 pls help

I can't add a picture and English isn't my first language so if there is anything unclear here please do ask and I will do my best to explain

Also unsure if this is the right flare...