How to identify the 3 thermals sensor connectors from the mac mini motherboard? I opened my mac mini to switch the DVD with another hard drive and I forgot to take a picture with the ways the 3 thermal sensors are connected.

THeir codes on the mainboard look like:


J5550 - left one, when you look from the front of the mini (dvd opening towards you)
J5520 - middle one 
J5560 - right one - the closest to the two sata connectors
One of them is for the DVD
One of them is for primary HDD near the connect
One of them for the primary HDD on the other side (glued)


How do I pair them? It's important as I do not want to mess the logic of power management.
I suspect that you have found the answer via other means, but I'll answer it for the next person that finds their way here.

I was looking for a way to repair the connector on the motherboard when I found this question unanswered.  I'll continue my search after answering.

So, after much double checking:


One of them is for the DVD.


This is connector J5550. From your perspective, the left one.

One of them is for primary HDD near the connect.


This is connector J5560. From your perspective, the right one.

One of them for the primary HDD on the side (glued).


This is connector J5520. From your perspective, middle one



PS: I would recommend including your Mini model in the future.