[neweuser]

To me, when you have a series wiring set up, you should know better not to hook all up to common ground. Really, you can only blame your self not someone else. Especially if you can't say their name as they would know who they are. I don't know, call me stupid here.
Anyway, from the pics that you had, it made no sense why you would hook it up that way, but that's just me. I have the same LVC, i just wired it in like the ubec would go, no worries. But you are using one batt to, so not sure on that. Although, when you are using series, you need to remember to complete the circuit as well if you are only going to use one side.