Hmmm... yes, this is the case and I thought I was using the little greenish yellow dotted line correctly. My Periapse and Apoapse seem to be perfectly on target...
Where my issue comes in, at least according to the cat with the crazy hair that hangs out at the dumpster with me, is that this 'Angle or Argument' of Periapse seems to be related to the orientation of the elliptical nature of the orbit in relation to the body it orbits... Kerbin in this case. The cat is absolutely certain that if I aim the rocket at or away from Kerbin, it rotates the ellipse in relation to the body I'm orbiting.
I tested that feline theory with those dotted lines and sure enough it seems to work perfectly. I've decided to name the cat Newton, because he weighs a ton when he jumps on me trying to steal the food I've found in the dumpster from me, and our relationship is relatively new. But I don't know what I'm supposed to be 125 degrees in relation to... the Sun-Kerbin Orbital line, radial line?
I'm hoping to solve this angle thingy so that maybe the other Engineers might let me move my box into the VAB. The spaceproof paint I've put on the box is, sadly, not rain proof and I have to keep repairing the box.
Thank you for the help. I have matched the geometry exactly but the angle-argument of it is what I can't verify. I need some kind of reference line to set that. It would be the ascending node if the orbit wasn't to be 180 degrees, but at 180, now what do I do? Newton, the crazy cat that is now mocking my typing skills, says if I ask louder I might get more help. I don't think that works as my volume is set as loud as I can make it but the text doesn't seem any louder... one issue at a time I suppose.