If you still have the transit cable in you cannot charge from charging point from the orange 🍊 connection cable.  Switch off break circuit breaker remove battery.  Then unplug yellow and black connectors under seat 2020 version 2019 only yellow.  Remove cable/s and connect the remaining black and yellow plug 2020 version or just yellow 2019 version.

2019 has 4 small pins on plugs, isolating switch in battery compartment.

2020 has 5 small pins in bat plugs and isolating switch under seat.