The "E" is also "E" in the German, so I assume it stands for Ereignis. The "t/there" looks like a typo of "t/here".
From this perspective one can already see which unifying and enjoining power of projecting-open is needed in order to enact the enjoining leap as the enspringing of Da-sein and to prepare sufficently the grounding in questioning-knowing.
P. 218