During The Battle of Jakku, after using the orbital strikes to destroy the AT-AT's, you'll land beside a downed Star Destroyer with the intention of preventing the TIE Bombers from taking off. When you get control of Iden, proceed towards the objective, but when you get underside the ship, proceed to hug the right of the area, you'll find the collectible as I did. Proceed round the area of the map, and you shouldn't be spotted, there is a Scout Trooper and an Officer at the far end, simply be crouched, sneak up behind him and use a takedown, this method seems easier than doing it in the Imperial installation earlier in the game. Let me know how it goes for you, took me one try to do. Like, comment, subscribe and share if it was helpful. -Cyber_Stitch