A little reading around shows the chaff/flare dispensers to be the white areas on the top of the fuselage towards the front of the horizontal stabiliser, there's one each side.
I went looking because I was sure I had seen chaff/flare dispensers scabbed on to the fuselage on some, and that is correct, there are variants with chaff/flare dispensers built on to the back of the aft upper fuselage air intakes, and they cover the internal positions.
Will the crew have been flying around that area with constant chiming from the RWR receiver not letting them forget they were being looked at by various radars in various modes? I wonder if it can all be muted...
In my opinion, it's disappointing that shooting down the aircraft was the recourse chosen from what the Turkish say was a total of 17 seconds over their territory.