The Mountain Trolls Minikit?

[Ironloss]

Hey everyone, I’m currently stuck because I cannot for the life of me find the hidden mini kit in the Mountain Trolls level. I cannot find a single video of someone finding it online anywhere and the trophy guide I was using on PlayStation trophies incorrectly states that it’s behind the rock by the dock which requires Gollum. However, when I go to that location there’s a region map hidden there and not a mini kit. I’ve played the level dozens of times now and cannot find it. Any help would be appreciated because this is a platinum blocker for me