At the given coordinates, there is an electrical transformer room with a blue sign on the wall. On the sign you will find a five-digit number, which is marked as ABCBD in this puzzle.
As a result, eastern coordinates can be formed from this information by using formula
E025 36. [B+C] [C+D] [A]
At the additional waypoint (virtual stage "EB") there is another smaller electricity box. From the side of the box, there are seven yellow-orange labels with numbers or letters. Lets mark these marks as EFGHJKL.
Northern coordinates are N60 58. [F] [J] [G]
To get your hands on the cache container you will need a tool. Using a fishing rod is recommended.