Monty is standing near a tent outside the Factory Entrance after you cross through the Machine Room and Concrete Tunnel. Once you cross through the secret garden you enter a field in front of the Factory Entrance. Once you enter go right and find Monty at the back of the field.
@@corysgames how do I open tunnel to the sewers as I thought I needed manufacturing level 3 to be able to craft valves for the machine room fuses box's sorry kinda confused and stuck buddy