depends on which model...
but for the most part, easiest thing is to take the tab from the lid, and just insert that into the port....these are odd setups, between a switch, a locking mechanism, and a magnetic clip....
on others, had to place a magnet on front, and as the lock tab pushed out, you had to push back about half way....
like I said, they have different models and versions, but most can be operated with the lid open...