Location of SIM Detect Components on Logic Board

I have a Water Damaged iPhone 5s that I'm working on which cannot detect the SIM card. The phone has been properly cleaned and sheilds removed but unable to spot any obvious damage. I was hoping that someone would know where the components are located on the logic board that would detect the SIM card?

I've tried different SIM cards and the Logic board has been cleaned multiple times with an ultrasonic cleaner but no luck.

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