Kuberg Freerider seat removal for battery removal

[maizediffley@gmail.com]

I just picked up a Freerider and I want to remove the battery for winter storage.

I am trying to figure out how to remove the seat but I cant figure it out. Kuberg says to remove two rear screws and then slide the seat back. I did that but I cant slide the seat. I can see there are two more screws holding the seat, but they are not accessible do to their location.

Any help would be appreciated.