It was not my first time there.
I already went there once.
I never knew about that place before though.
I had just discovered it recently, with my friend.
I went there thanks to the same hobby that is bringing me back today.
Except this time I'm not searching.
Because I know where it is.
I let him search, while I observe this colourful place.
I see him looking at his distorted reflection.
I think he finally found it.
He marked it as found.
And then, he put it on the map.

Judging by the date, it seems to be related to the second document.
Which means the locations are probably very close.

Your clue here, "he put in on the map", will give you, for L3: abcd-efgh

You need to name this location and use its first letter.
It will be the 5th password letter:
<[|— — — — L3|]>