Remix from RedvsBlue's Solder buddy.
All I've done is add a thicker base as i had the jig moving about when thicker longer wires were being connected.
Also i have enlarged it about 35% so now its about 75mm wide, then I added little gussets at the base to help stiffen the stalks a bit more, depending on how much infill and wall count you use etc.
2 versions, the second one is a little taller but have trimmed the stalks, so it pinches wire a bit better.