It looks to me that the 2 outer connector holes are your battery positive and negative, with the inner 4 the balancing wires. So it's all in one.
Obviously replacing it with the battery that has the same connector would be the easiest option. Only you know your skill level.
This is a straight fit as far as I experienced, only thing to watch out for is the screen “display area” is just a bit narrower than the dna60, so you have to make sure it’s lined up properly not to look wonky
here’s my retrofitted BB - been running it as a daily for month now
Glad you're all set and working fine. Your Profile 8 might have the 'enable replay' box checked. Many well intentioned Theme Designers allow Replay to work when a TC material is chosen which causes crazy shit for unsuspecting users.