generally you are going to have both a FUSE panel, and a BREAKER box, or a combination of both. FUSE panel is for your 12v devices such as lights, fans, awning, slides, etc., while your BREAKER box is for your 120v devices, outlets, and appliances when you are plugged in.
Whether they are separate or in totally different locations matters not, though most rigs have a combined box with both, including your converter/charger.
'14 Thor Palazzo 33.3 compact diesel
KingTailgater2 Dish, 100w/5amps roof SOLAR, BlueOx, 100,000+mi since '14... US, Alaska, and Canada... GA, NC, now N AL : )