taking out outside seats 2000 254 larson help

[rubyray]

how do i take out the outside port
seat that is secured to the side just outside
the sliding door on a 2000 25, larson
searay and alot of others seem to have the same seat setup
i tried lifting up the 2 cushions on the side
walls i just could not get them to move

thanks in advance

oh i need to remove them to install an antenna
mt on that side