Petty Dart upper A-arm placement

[ZTony8]

I'm in the midst of building this kit and can't discern the proper placement of the upper A-arms.There are notches on the front chassis rails(3 left,1 right) that don't seem to relate to any part of the arms.There are no locating nubs or slots on the arms either.Do I build the front suspension from the bottom and use the spindles as a placement guide? Something else?Hints or guidance, please.