On my spinal tap machine, I crimped the connectors. It sucked. Took a long time, and my crimp-fu was weak and had to redo them (don't have the right tool.) On this little cocktail machine I am making, I soldered it up in about 20 minutes. I don't imagine that with home use it's going to have many problems, and am considering redoing the wiring on the spinal tap machine to make it neater. I am pretty fast at soldering, and technically good at it (neat looking, uniform etc - I do a lot of it at the theatre I work at and at home with my own audio gear.)