I have a 2014 Ford Focus 5 speed. We tow ours with the ACME dolly. No issues and no disconnecting wires...
The manual for the focus does state...
When done towing, start the engine within 15 minutes of reconnecting
the battery cable. When reconnecting that cable, tighten it until it is
snug against the terminal. Be careful not to over-tighten.
I assume you are doing that....
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