Let's say I've got a 2960x stack like the one shown below - as you can see one cable is missing as it was too short, so I ordered a longer one and am awaiting delivery. One thing I wonder about though is whether I'll have to reload the stack (or at least members 4 & 5) or will just shutting down the individual affected stack-ports alone prior to physically connecting the cables and then re-enabling them again do the trick just fine?
2960xstack#sh sw stack-ports
Switch # Port 1 Port 2
-------- ------ ------
1 Ok Ok 2 Ok Ok 3 Ok Ok 4 Down Ok 5 Ok Down 6 Ok Ok 7 Ok Ok 8 Ok Ok