Ok, lets start from the beginning.
We know how ruins were found, and that this is very likely might have been not intended way for them being found, so lets for a moment leave it be. We need to answer following questions:
How did we encountered Ram Tah and his mission? Was there any precursor for that, or was it by stumbling accident?
Unless there were no clue that led to Ram Tah, and since he does not tell us ruin coordinates in his mission, it can be logical to assume that the first ruins we were supposed to find (not the one we currently have) would also have a pointer to Ram Tah
and his mission. In that case, the first ruins will be the keys, since they theoretically supposed to lead us to the next clues. So it is very likely that we missing something important by doing this whole ruin mystery in a wrong order, thus we stuck. Maybe we should stop for a second, dismiss all we have learned so far and try starting from scratch, figuring out where it all begins? I refuse to believe that the only clue to system with ruins have been some unrelated video on the internet, that just does not seem like a good game design to me. And then ruins on the ground were found pretty much by a sheer luck, considering how low is drawing distance, whitch further ads to a point that they were found not the way they were supposed to, and we might be missing something important.