i looked at some pics/videos of the 2012 183 and i did see a round silver thing on the front of the converter/breaker/fuse panel's cover.
is that what you're talking about?
if so, i've never seen that on any Roo/Shamrock. didn't they tell you in the walkthrough what it did or what it was for?
the converter's manual should have some info what it's for.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC