Not really. It's a bad idea to solder big wires that take a lot of current. If they get hot the solder melts, spills liquid metal on things, and the wire can fall out of the connector if that's all that was holding it. To make things worse, even a small amount of solder past the connector makes the wire rigid at that point and it can flex and break right there.
I do plan to solder but just a bit. You need to crimp first to make sure you have a dead solid mechanical connection. I think then I'm just going to put the tiniest bit on the terminal end, not enough to even bleed out to the wire end of the connector. This is just to help combat corrosion and keep a solid contact.
Scott