Ps4 Pro screwed on and any liquid inside?

Hi, I unscrewed my Ps4 Pro and discovered these 2 spots, I would like to know whether this is normal or something has come in.

Thanks in advance👍

Solder grease from production is harmless!

If you haven't put anything in or spilled it yourself, these are production-related residues that would have been removed if there was a problem associated with it. This can be flux from soldering.