I really need to fix my grinder, it's been held up for months because I can't find the connecters. On the end there is a little connecter with a hole in for the screw, I got 2 sizes but they are both the wrong ones. Can I connect the old wires (that have the connectors on) with the new wire I am using for a cord? The way I would do it is strip the plastic sleeve off, and twist the 2 wires together, then sauder them together. Will that be okay?