Gold Bar (L) (Resident Evil 4 Remake - Separate Ways)

Inside the large treasure chest on the eastern platform. Accessible by dropping down the hole in the south east corner of the top-most level of the stairwell.

Inside the locked chest of draws on the north east side of the room. You need a Small Key to open it.

On the Brute that appears here after you have acquired the Power Unit. He drops this when defeated.

Inside the trash container in the southern half of the field.