Hello, I had ordered an Android radio/touch display from China and it finally arrived today. Before I take half the interior apart, I would like to set up and test the device at home before it goes to the installation in the vehicle. My idea: I still have a small 12V 12Ah 200A backup battery, which I would use as a power source. Fortunately, the included manual shows the usage of the power cable (see Appendix). bel 1+4 (BAT + ACC) connect to each other and connect to the + pole of the battery. Cable 2 (GND) to the – pole. Does this fit or do I imagine it too easily and shoot the radio?