OK...I think that answers my question. I just wasn't sure if the nut that goes on the axle spline needed to be secured or not. The hubs I have fit over the end of the axle but don't look like they would accommodate the nut if I put it on, so I wasn't sure if it was alright to leave that axle unsecured in there. I notice it will move back and forth a little bit but cannot disengage from the hub.
Whew ..... I struggled to try and describe that, does all that make sense?
Tom