Dumb question on scissor lifters for pop top.

Thanks John.
You have answered my question.
I looked high and low on the internet and none of the pictures I could find were close enough both ends to see what was what.
But, hearing what you say, I think as long as the central pivot point is centred from and rear it will be okay.
Incidentally, I learned from bitter experience to take more care unwrapping these buggers. Now I have a chunk of thumb and half a bucket of blood stuck on one of them.
Keith