I ran the serial cable underneathe the passenger seat where there is a slit in the carpet and I grounded it to the factory ground under the carpet by the door. What exactly is the accessory connection for and is that battery thing for if i want to hook it up to my home PC? You just use HyperTerminal to program and log right? No cool graphs or software, correct? I might need your Stage2 map because I think they sent mine with stage 1.