I've used choc block in exactly this situation and it seems to work OK but I have wondered about these instead. Spring-loaded so more vibration-proof and even include access for a test probe. They come in 2, 3, and 5-way versions which could be useful in some of the junction boxes on my machine where, say, multiple limit switches with common ground connections all meet. I find it fiddly trying to use choc block for multiple connections as you end up with two wires in the same hole, which never seems satisfactory.