S.U. fuel pump question?

I bought an N.O.S. S.U. fuel pump on e-bay, the pump has doesn't have any
markings, either positive or negative ground.

I took the plastic cap off that covers the points and found an orange
capacitor inside.

My car is positive ground, I don't want to fry the pump if it is a negative
ground pump.

Thanks for any info

Greg Higgins
63 sprite