During the 'Old boy's Club' mission you will discover that to unlock the main terminal in the HRA Lab so that you can continue with the story you will have to find five terminals and insert in each of them the card which has the appropriate symbol. Our How to Solve the HRA Lab Puzzle guide will give you the solution.
To begin with search the HRA Lab for five punch cards with symbols on them. These punch cards are scattered throughout the room and you will not experience too much difficulty finding them. Once you have them search for five terminals, four of the terminals are found downstairs, while the fifth is upstairs. The upstairs terminal is terminal number four in the sequence. you will be able to easily identify them as they have their number on the side. If you now insert the punch cards with symbols in the right place you will unlock the main terminal. The correct combinations to solve the puzzle are below.
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