Wow it's cold down there in the garage.LOL
I used spade connectors and a sleeve of heat shrink tubing to cover the connection.
That connector should be available at NAPA or Carquest as a replacement part.
I haven't had any issues with corrosion on the wiring using this method, been together for 4+years and looks new under the hood for the most part. Drive it in all weather(except snow) and is holding up well. FWIW.
Tom