Does anyone know of a bike cover when the bike is on a rack on a car. Something that would keep the bike dry if you got into a rain storm while transporting the bike. Also does anyone know of a plug you can put in the outlet on the bike when you take the battery off and put the bike on a bike rack on a car so dirt/water will not get into the connection port?
Check out the one from Pro Bike Tool. It's one I see lots of people purchase: https://ebikeescape.com/ebike-covers/
If you want to use the cover when underway you'll need some additional lights since the cover will block brake/turn signals. Also keep in mind your license plate won't be visible.
Regarding the caps or plugs for Rad bikes here are two options:
https://dragonfly2.net/shop/ols/products/rad-battery-terminal-caps?fbclid=IwAR0E4GsfYEQw96sEdJ6cqTOcP8c_osNXKU4dUSZfdr0FikPctN-lY5p6b-Q
https://1859-northwest.myshopify.com/collections/e-bike-accessories/products/battery-tray-cap-sets-rectangle-connections-free-shipping?fbclid=IwAR36UShyscz3SfZNRbWlQ0EfbbjXMetoFuWUZ1C6z2eGJOUosNuDqazWMEQ