I would shutter to guess its a power trace issue. set up that way to troubleshoot possibly. I am just guessing here but with great soldering skills way easier than having that battery and holding wires everywhere. The common practice on compact motherboards and lc's was to lay a wire and solder the ends to create a new trace. Not sure why that bothers you, if people didn't leave pram batteries in for 25 years we woldnt have so many trace issues :