Thanks for all the comments/information and after further investigations at looking at several engines with pullmor motors, it looks like pullmor's with the 1 & 2 designation are on engines with electrons e units. Every engine I looked at with mechanical e unit didn't have numbers, only the ones with electronic e unit. So this seems to go along with Rob's comments above, it's to distinguish between front and rear motor wiring with electronic e units.
Also thank for the Hennings connection.
Thanks again,
Bob D