Having used CTek Battery chargers / conditioners for years, I'm very keen on them.
I have on previous bikes used the standard supplied quick connect fixed charging lead, just tucked it away when not in use. On others I have also used the panel mounted quick connect which has a built in battery condition indicator which works very well as well as being reassuring before you attempt to start the bike and with older bikes monitor the charging circuit while riding.
But didn't want to hack into the panels on the Trophy so decided to use the third option to avoid having to continually removing the panel for out of use charging or checking the battery, the panel is bound to get broken eventually and quite possibly the one day I decide to go on a longer trip without checking the day before it'll be the day when the battery decides to retire.
CTek have an optional accessory that's not commonly known about, it's almost the same as the standard supplied fixed quick connect but with the monitor facility built in like the panel mount unit. It is bizarrely named
CTEK 56-382 M8 Comfort Indicator Eyelet and is not very expensive at £7.19 + shipping.
The moulded lead is long enough to route from the right mirror recess to the battery (for battery access and disconnection please see "Battery Removal HOW TO") allowing the connection with the built in monitor to reside there for easy access. It's also a perfect size to be mounted using a bit of velcro under the mirror shroud. This allows you not only to reach it easily for charging and checking but if positioned just right the flashing LED's can be seen without even pulling the mirror back, in fact it can be seen while riding but it's not really intrusive.