In general one should not rely on solder for mechanical strength. Crimp the wire to the terminal, and then add solder.
Plumbing soldering is a bit different, and probably as much a skill as electronic soldering. Of course you don't heat the solder, but you don't heat the pipe either. Only apply heat to the fitting, and the solder will be drawn into the connection when the pipe gets hot enough for solder applied at the joint to melt.
Plumbing soldering is a bit different, and probably as much a skill as electronic soldering. Of course you don't heat the solder, but you don't heat the pipe either. Only apply heat to the fitting, and the solder will be drawn into the connection when the pipe gets hot enough for solder applied at the joint to melt.