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