New BOSS CAP8 8 Farad LED Digital Car Power Capacitor Cap + 4 Gauge Wiring Kit

so there hasn't been very many tutorials online about how to charge this capacitor so i decided to make one myself i am still learning how to do this and uh i experiment myself uh as of right now i have the head unit amp control wire or the amp wire basically it controls the uh amp to the stereo little 12 volt you know usually i have it going straight to the amp as of right now i have it plugged in to the capacitor and i'm getting a readout of 11.8 so according to the readout i'm getting with that capacitor i have to match the same output as the battery so i'm going to go measure the battery with the volt meter after that then supposedly you can then connect the positive to the positive uh if there's any kind of discrepancy it could cause the power to go back and burn out the fuse and you also want to make sure that you are plugging in that that's the positive that's a negative if you h