I would solder to a right angle connector.
I don't like barrel crimps. I like SAE terminals for crimping. On occasion I can get barrel types to crimp sae style by first indenting the split, then flipping and finishing. The SAE connectors have a second set of tabs to also grip the insulation. This style crimp is the best imo. and is designed to experience vibration and other less than ideal situations found in automobiles.
Pop the hood of your car and look close. You will see this. A better tool than the Klien above is needed for perfection, but the Klien above can achieve this with some practice.