This is completed in Chapter 3. In case the video goes down, little bit after the beginning of the chapter, your group will cross a janky bridge where you will fight some necromorphs. The group will talk about trams and Lexine will mention her father. After you pick up some ammo, you'll be given a choice between two paths, select the path on your left leading to a meatwall. Cut through the walls, take down the necro at the end, and then successfully hack the panel to gain access. There are some collectibles and more ammo awaiting inside this storeroom. The trophy should pop soon after. If you miss this opportunity, you can use the Chapter Select to re-play the level for another chance at this.
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