[rgbeard]

imported post

Either connect to both battery terminals, or connect the positive to the terminal, and the negative to frame.

Either way.

I often use frame as the smaller-than-car-battery terminals can be a challenge for jumper cables.

 

[rgbeard]

imported post

A little more on how I normally (try) to do it.

1. Both units turned off. Keys off.
2. Connect the positive, on each vehicle, then the negative terminals.
3. Turn on and start the "donor" vehicle. Let it run idle for a few mins. (3-5 mins)
4. Turn on and start the "dead" vehicle.

Assuming engine-start was successful, disconnect negative first, positive second.