2.4L KJ Serpentine Belt Replacement

[Brit Jeep]

I am trying to replace the Serpentine Belt on my 2002 2.4L Liberty Sport. There are plenty of videos of doing this on the 3.7L KJ on YouTube, but I can't find any of the 2.4L. I have read the service manual for the KJ and know that I need to release the tension arm but there is no nut to attach a ratchet arm to to lever the tension arm to release the tension and allow the belt to be removed. There is a square hole - should I fit something into this to use for leverage? Any advice appreciated.

 

[turblediesel]

A ratchet should fit the square hole, 3/8" or 1/2".