Remove Stock 40w Panel Before adding?

I did wind up just going ahead and adding the two additional panels to the OEM connector with a splitter, and everything seems to be working normally. It is hard to tell how much power the panels are pulling because I think the charge controller I have only shows me the current amps that are going into the battery, not the amps the panels are producing/capable of producing. I've never had the batteries run low yet, but the highest I've seen (I've actually had these installed for about a week but started second guessing my install) is about 6-7amps. I know I won't get 240w in reality, but on a sunny day I figured I'd get 180ish or so, which would be more like 12-15A right?