I had the mppt replaced in easysolar 2 gx

Hi there I had to replace the MPPT in my easysolar2gx and I have a cable that does not seem to have an obvious location . My problem is o have lost the picture I took before it went of to be replaced

Hi, could you maybe post a picture of said cable?

It’s

the blue one and is linked to the top of the board

That’s a temperature sensor.
If I remember correctly it is connected to the grounding screw on the side of the MPPT.

Try Google picture search.