question for fabricators patch panel

[Gary in Mozarks]

I am working on the body of my 38/39 panel. The left rear quarter is a mess. I intend to cut it out so I can work it from the backside on an anvil and sandbag. then weld it back in place. I have to cut the last quarter of the wheelwell, up to the double bead, then across to almost the back door and down to the bottom.

My question is: Is is better to try to splice right at the very edge of the double bead or is is better to splice it back, on a flat? Say a 1/2 inch above or below the beads.
Thanks Gary