[Zeke]

Sleeve them. You can use the crimp part of the little red spade connector. There may be smaller yet. The OD should slide right in Oh. gotta use a lot of shrink tape with a stiffener inside of the ST or it will break at the sleeve.
Sometimes the spade or barrel part of connectors is universal no matter the color/gauge. So red to blue or Yellow. I bet you know this stuff and have all the parts.

Yes, I've doubled over and soldered.