I bought a used Powertow which came with these hookup connections. They're used but are in good shape and work well. This is the "ADP-4" as seen at this link, works with Bonanza (33, 35, and 36), Baron (55, 58, and P), Debonair, Duchess, and Travelair: https://www.powertow.com/Adaptor-4_p_262.html

These will work with the Model 35 EZ, 40 EZ, 60 EZ, 65 EZ, Key EZ, and Thundervolt 12V DC tugs.

$85 shipped within the US.

Ill take it,Pls DM me w info Thanks!