Video by Vespa Motorsport via YouTube
Source
Noco Connector: https://www.scooterwest.com/noco-genius-battery-charger-g750-all-6v-12v-scooters-1.html
Battery Tender Connector: https://www.scooterwest.com/battery-tender-plug.html
Battery Tender: https://www.scooterwest.com/battery-tender-12v-battend12v.html
Noco Genius: https://www.scooterwest.com/noco-genius-battery-charger-g750-all-6v-12v-scooters.html
Optimate 1: https://www.scooterwest.com/optimate-1-battery-duo-charger.html
Optimate 7 Select: https://www.scooterwest.com/optimate-7-battery-select-charger.html