How to find the parent unit in REN?

[Sgt.Barnes]

Hello everyone,

Nice to become part of this community as I'm new to JTS games. My question is on Renaissance. I try to make proper use of skirmish units, but how do I know what the parent unit is if I want to recombine them? There is no highlight option and the units names are pretty basic and not numbered or something like that. Looking into the manuals I couldn't find it. I only know if a unit has a skirmisher detached. 

Does anyone have an idea?

Thank you (maybe I'll have to return for another question someday)!