HACK/MOD 9S and Underground Colosseum (NieR: Automata)

Good afternoon everyone)

1. HELP PLEASE, I don’t understand at all how to subjugate machines using hacking, I watched a video of how 9S is hacked, after a successful hacking there is a choice: destroy, subdue or remote control (or something like that). The bottom line is that I have no choice and my car immediately explodes. What am I doing wrong? Do I need to install a chip or something?
2. In the Underground Colosseum, there are only 2 cars to choose from and 3rd round 60 lvl. (although she herself is already 67) I can’t get through them (there is a small one with arms and a very small one without arms and that’s all). And the administrator says that you can hack from the back unnoticed and a choice will appear, but I can’t. I killed all the machines while trying to subdue them, please help (((
In some passages, cars even automatically appeared there, for some reason, but I don’t. What to do?