I have a board fitted with a 10-way 3.5mm screw terminal in a similar style to what you see here (GSO14V-3.5):
I am after a reliable contact to four of these points for testing purposes, without unscrewing and screwing the terminals each time - there are no other test points available on the board. Terminals are pre-screwed in. Currently, four solid wires are used with a rotational force applied to try and force contact - but this has not resulted in a reliable connection thus far.
My initial thoughts are inspired by a pair of C-clip pliers, e.g. an externally contacting test clip - squeeze to pull the halves together, release and they spring apart, then produce a jig to position the four required together. Alternatively, I can envisage a formed wire piece which performs the same external spring function and press fits into the receptacle.
I cannot however find either such product on the market, is anyone aware of such a device in test-clip sized form, or, does anyone have a better solution?