They should just pop off and on. There maybe some wires on the back side that will need to be disconnected and reconnected (pay attention to which goes where) depending on your trim level, but pretty easy I would imagine. The center section clips on to a plate that moves when you adjust.
I have one of those cans for my mower, I ABSOLUTELY HATE THAT NOZZLE!! lol. It's such a PITA to push that little red thing down and hold it while pouring. As soon as I use all the gas that's in it, it's going in the trash :LOL:
Hope this is the right section. This might have been discussed before, but my searches only came up with where the funnel is located....and transmission funnels :facepalm: lol.
Not necessarily an "off-road" topic, but I figure those that do a lot of off roading would be more inclined to have...