The numbers add up, 6.8 amps x 18.4v x 2 = 250.24w. You won't get that through those little cables or with the controller mounted on the solar panels, but with decent size cable and the controller mounted very close to the battery and even bigger cable between the battery and the controller and you can expect to see up to 13 amps from those panels. Keep in mind the weight and you needing to put them out each day, move them every 15 mins to 30 mins, then put them away again at night. It doesn't take long for the 8kg panel weight to fell like a tonne of bricks at the end out the day.
Best to make the cable unplug at the solar panels and at the A frame or side of the RV, then wire the Anderson plug to the controller solar inputs. That way you only have to drag the panels out, the cable can be just rolled up under the vehicle at night, or put away if you want, but much lighter as two separate items than all in one bundle wrapped up with the solar panels.

As far as price, close enough to $1 per watt is good, you get a cheap controller and a bag thrown in as well as a few hinges, legs and a handle. The cable, Anderson plug and alligator clips might come in useful for something, just not for using with these solar panels.

T1 Terry