Fortbyte 82 is located NW of the block as shown in this map:
Once you arrive you will see 3 pressure plates. A person must stand on each plate. So you need 3 people to stand on the plates and a 4th to collect the Fortbyte.
It is nice to help others and to skip turns in collecting the Fortbyte.
Fortbyte 82 video
In this short video we show you the location of the Fortbyte and how to collect it!