Here is a series showing the highlights of my lug handles for a jar. In this case the jar has four hadles, thus I start with four equal sized straps.

I size up where the handle should go.

Welding the slug in place.
I start at the center and work my way down and around the handle.
I start at the center and work my way down and around the handle.

I should also mention that I size up all four handles at the same time so that I start at the same height. Then I add slugs and smooth out each handle consecutively. That way the "ears" are more or less level to each other. This works well but doesn't guarantee that they will in the end be at the same height. But sometimes we have ears that are a little askew on our bodies. too.
Ha!
Ha!