[UAHaerospace]

here's a 'diagram' of a typical 50amp RV service(240v) into a typical RV...
where it simply uses both 'sides' of the power, which is 120v for each...
(which is also why you actually have 100amps of 120v to make use of!)

{if you have an ATS(auto transfer switch, which most newer RVs do), it simply sits between the shore cord and the main panel - nothing with the wiring shown here is any different, otherwise}

and yes, there are main panels that are designed differently, with a 50amp main breaker set on the far left, or even some panels are vertical, more like yours at home, but in the end, the same wiring scheme remains.
My coach even has a similar, but different, panel, with the Main breakers on the far left, and an integrated 'sub-panel' set of breaker, with it's own power buss bar, on the far right - which is simply a more 'custom' main panel design that allows the manufacturer to more easily install the 'whole house' inverter's output within the main panel, without a totally separate sub-panel.