loose wires

Thanks. Yes the screws are tight but again the spade part will slide in and out of the plastic bulkhead. It just does not seem right to me to be able move an electrical connection. If the spade is pulled to the engine side wouldn't it pull out from the under dash side?
The thing is on those cars you have a solid piece of metal going through the "connector." The solid piece is loose in the plastic. The wire connections at each end so long as they are "good" to the metal are fine. I don't know how loose you are "saying" will they pull/ fall clear out? That might be a "short" issue, otherwise maybe some sealer RTV/ rubber cement etc to firm them up some