Pick Many Free form???

I'm hoping someone might be able to help me out here... I want to create a simulation of taking measurements with multi-meter. Seems simple enough, however, the scenario has six spots/locations to place the meter leads. Two of which (when both have the leads dropped onto) are correct. Does anyone know of any examples of this? Will it take the use of Variables?

It's not far enough along to upload a .story file, but I've included a snagit screenshot of what I'm working on.

THANKS for any input, tips or advice on this one!