Translation help needed for speaker cable with ground wire

Hi everyone. I'm checking out various speaker cables and have a pair of "Litz cable 400 x 0.10 with shield copper".  However, I need help translating the notes that came with the cable. My question is where does the ground spade on each set of cables go? Text reads as follows:

"To the departure to connect the spade to the negative amplifier (black) with out amplifier. To make a lot of attention that the fork not heels the positive amplifier not to damage it. To the arrival in the general loudspeakers, to connect the spade to a grapevine, never the positive or negative. Otherwise you are able not to also connect the spade to the loudspeakers, in this case you must isolate it very well don't risk to touch the positive pole and to damage the amplifier."

Any help?