Photo 3 looks like the hole for one of the tensioners, but the tensioner is missing (not unexpected when a dealer is doing a diagnostic tear down to figure out what failed):
I'm not exactly sure where you are thinking on going with this, but if the IMS has failed, you cannot just install a new one and retime the cams. The engine will be full of fine metallic grit, the cams have probably jumped time, and some of the valves are probably bent as well.
That engine needs a complete tear down and rebuild.
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