I imagine that you want two (or more) signals to trigger an action (do almost the same thing) and each of them can do some more stuff, that can be achieved with the help of an "helper" function - a function can do the things that are common for all the slots and you code a slot for each signal (with proper connection) and in the slot body do the signal-specific things and then call the helper function (that does the stuff common to all the slots).

//if i didn't guess the "design" than please say more about what you are trying to do, and than we can share opinions about that.