See my pics on link below.
Front trunk and jumper cable issues
I have a Batt Tender. I purchased the adapter that bolts to the Pos/Neg cables. I then routed the charging leads towards to the windshield. When I need to hook up the charger I simply pull the lead out and connect the Batt Tender. When not in use I simply tuck the charging lead under the top of the hood.
Additional benefit: If my battery ever dies I can plug in my charger and I should be able to unlatch the hood.