go around the connector. it has a rubber boot seal.. cut a slit and go through that way.. pull the wire out and the seal reseal's itself. The crimp provides mechanical strength for the connecion.. the solder provides electrical srength for the connection, being a vibratory piece of equipment.. it could, though may not, suffer from loosness, or tearing from the vibrations etc. Crimps are only the quick and easy option anyway. My dad being an ex electrician always taught me, my work must outlive the component im workng on.
Though it does look like a good job.