BB30 to BSA frame conversion with internal cable routing?
In the first picture it looks like the holes are simply machined to decrease the weight of the adapter without compromising strength. My only concern with the frame and adapter would be tolerances because you wouldn't want it to fit too loose.

The second picture definitely looks like a bb30 frame but without calipers it's impossible to know the diameter and width for sure. 

The gold/red tubes you see on the bottom are the internally routed guides for the rear derailleur cable and rear brake cable/hose. Since this frame has a lower compartment where the cables route, you will not have any issues with internal cable routing with any bottom bracket combination.