Question about Ctek Battery connection cable Comfort Connect Eyelet M6

I bought the M6 cable for my motorbike. Presumably the M8 will then be for the car battery.

I don't quite understand the question: It says so in the title: Battery connection cable for M6...

M6 is the diameter of the thread for the battery connection. Now it depends on the diameter of the battery terminals of the car battery to which the cable can be connected. Of course, you can increase the diameter to a certain extent with a round file.

However, it is better to know exactly what the diameter of the battery terminals is...