You have imported a Defender from Europe and are are super exited with it? Great. 

Now if you try to hook a trailer to your tow ball, you may face a problem as the plug standards are different in Europe and in North America.

We can count mainly 3 different plugs

 

Euro 7 round plug

The main difference between euro and US style is that euro style plugs have distinct wires for brake and turn signal whereas US style have a combined wire.
This can be worked around with a small adapter that will convert/merge the signals

 

In order to hook a US trailer onto a euro truck, you will need a few items:

• Euro style male plug
• NA Style 7 blades female plug
• Turn/brake merger converter