If you use a good crimp tool, the crimp is very robust.

This is the crimper by which all others are judged: https://www.amazon.com/Thomas-Betts-WT111M-Insulated-Terminals/dp/B0018LD2PU

You don't have to spend that much money-- you're looking for the dual size mandrel, with thick jaws to provide a crimp over a wide area.

As an alternative, consider mounting push disconnects on the crossover board, or european style barrier strips (no spadelug required.)