If what you are asking is how to run a wire from engine room to switchboanel, I have found that an electricians “fish” taped to a flexible small Bluetooth “endoscope type” camera has allowed be to place wires everywhere I needed to. My boat is a SO469 but routing might be similar. From engine room I had to head through battery area and aft cabin. Then behind hanging locker and galley cabinets. Sometimes removing the back of the cabinets helps.