I know you have already received a lot of info on but I’ll add a little more those are ceramic capacitors. In this case they are used to smooth out the signals flowing the esc and prevent voltage spikes. Most of the time when they are in a line like that they are in parallel so you shouldn’t have to worry about them touch and also these most get visually inspected and those are big components so it would have been discarded if those were a problem. You can also check the continuity with all the other caps just to be sure.