I started the assembly of the willow, with only one hand as I received a surgery on the left hand 10 days ago. Not that easy ! I began with the wiring harmness for the wings and the fuselage. Servos connectors are crimped. I now do this for few years since I bought a crimper at the local shop. It give good result and avoid to multiply the soldering points with extension leads. At the other end, I used MPX like green connectors. They are soldered, protected with heat shrink tubes, then secured with hot glue (standard). I really encourage everybody to do this even if the connector is then glued in place, the hot glue can removed in case of problem and, unlike silicon, doesn't chimically attack the wire or the plastic. It secures greatly the soldering mechanically. I do this for 15 years and had no bad experience.