I have been reading on forums and through the internet that mission discoveries can be found through slicing missions, specifically lockbox missions.

i been through days and days of doing grade 5/6 slicing lockbox and even the sliced tech parts missions and i have yet to find even a single mission discovery from any of these missions.

can someone point me in the correct direction as to where to find them, from grade 2/3 or grade 6, sliced tech parts mission or lockbox missions?

thanks in advance.