Creaking / groaning sound from right rear suspension

Thanks, yes, I understand about putting the car up on the lift causing things to shift around, and the mechanic did say that the front suspension was all original so I assume the rear suspension is ten years old. What I don’t understand is why the sound is exactly the same as the front control arms but when I look at the attached picture I don’t see very many places where this sound could be coming from. It seems like it must be coming from where the coil spring or the shock absorber attach. I was wondering if anyone had any experience with this issue and if which place was more likely to cause the sound. Also, the mechanic specifically said that the rear “ball joint” dropped when it was on the lift, I don’t see a ball joint in the attached picture.