When using the clamps, I connect the red clamp to the red positive connection point, underneath the red sliding cover, then place the black negative clamp to the earth bolt on the car body.
To disconnect, remove the black negative first, followed by the red positive.
I have the eyelets connected, just loosen the red positive bolt on the battery and position the bolt through the eyelet, I didn’t remove the terminal. Then wire the negative end to the car earth point on the car wing.