The trick to this is to magnetize the T3 screw driver. It will then keep the screw in place and help ALOT with the process of screwing it off (and not losing it) and keeping it steady to reassemble into the hole.

If you have a insulated long nose pliers along with a splugger and can get underneath the cable WITH the long nose pliers on the RIGHT side of the cable, towards the logic board, with the splugger on the LEFT Side of the cable doing the same, you can get the leverage to GENTLY pull this cable out very easily.

You can also use a sw version instead of a hw thermal sensor. I found on my 27 inch iMac 2019, that the hw sensor didn’t really work for me. In fact, some of the ssd cases used in the hard drive bay are made of plastic. I found for me using Mac Fan Control by Crystal Ideal a good alternative. You can use the free version, or pay for the pro version for about 15.00 dollars to have better control of your fan speed. Of course, your mileage may vary.