hellwig sway bar

When in doubt, I defer to what the F A C T O R Y did.
The F A C T O R Y put the bolt in from the bottom. The threaded end points UP. There is plenty of room to install the bolt the factory way. Are you aware that the end links should be installed with the car resting on its tires? This helps the sway bar sit at its best position to install the end link bolts.