Hoping this vague title might get some more attention than previous threads.

I'm about to install my RC Eng 440cc injectors. I got them second hand from Wesmaster so no instructions. I also purchased the connectors and spacers from RC.

What I can't find is any reference to polarity. I assume being a solenoid they are polarised and must be connected a certain way. Anyone know which is positive and which negative? I'd be happy to try it out if someone can assure me I won't damage anything.

 

Well, they're in but not yet wired up. Surely someone has some paper work on them!