Replacement Tail Lights

[wgale]

The tail lights on my 2007 Phantom Club Car were not working. I just bought the cart and thought they were burnt out. I got the replacement lights from the dealer and installed them. They worked for a minute or two, then blew a fuse. We drove the cart without the lights working when suddenly smoke started coming from under the seat. One of the cables had melted into the battery. The dealer is saying the lights were installed incorrectly. Any thoughts on this issue? Thanks.