On my first Topside I too noticed excessive juice between the base of the atty and top of the 510, had juice on the battery too. I thought it must have leaked from the top of the 510 but after placing an o-ring on the atty's 510 the leak on top stopped. Still have a pretty good leak on the 510 from the inside. I'm too lazy to box it up and send it off, probably fix it myself one of these days....or break it trying.
If you remove the bottle you can get a glimpse of the tube that carries the juice to the 510, that's the place that the juice is coming out of, a little bit around the battery positive contact.
If you remove the bottle you can get a glimpse of the tube that carries the juice to the 510, that's the place that the juice is coming out of, a little bit around the battery positive contact.