Don't you think that, if it was supposed to be user-accessible, the instruction manual would have something to say about it?
Manual here:
https://www.foodsaver.com/on/demandware.static/-/Sites-food-saver-Library/default/dwa91fefe5/documents/instruction-manuals/FM2100-000_InstructionManual.pdf
You could always contact the maker and ask
acp, April 2017