That red ring behind the holes was the anti-drain back valve.
With regards removing the filter - there are a couple of different styles of wrench available - use google and see if you can find a "three jaw" one - I use a cup style, but, I find I have to put a shop towel in for it to properly grip the filter.
98 - 1.8 Mitsubishi Pajero iO
98 - 2.0 Suzuki Grand Vitara - SQ420
05 - 2.0 Suzuki Grand Vitara - JB420
15 - 2.4 Kia Sportage