Yup, the crimp connectors are typically rated to the 600V range from what I've purchased. Pay attention to the wire you use. Common/cheaper automotive wire may only carry a 60V rating.
For my trailer conversion project and many others, I've mostly used terminals and wire from Ancor, rated to 600V, 105C. Even some modern sealed automotive connectors like duetsch and amphenol are going to be rated to hundreds of volts.