Two, one is Anderson power poles.
IN my RV the decision as to where to mount the primary HF/VHF/UHF radio was based in part on not wanting to annoy the wife.. Thus a room with a door. This kind of limits me but as it turns out said room has a significant advantage or two.
House 12 volt system as shipped was a pair of GC-2 maintained by a Progressive Dynamics 9180 with optional wizard.. Now I can give you my opinion of that 9180 with wizard, or the 9280, or for that matter any PD Wizard controlled converter (I have yet to find a better converter and I've been looking for a decade or more so said opinion is high, very very high).
On this RV however the mounting location (As far from the batteries as possible) makes little sense. But about half way between them is the main 12 volt distribution panel.. It's in the hall-wall (a very logical place) and the other side of that wall is the room with the door.
So I just tapped the 12 volt fuse panel, it has several vacant slots, Added a fuse and job done. The TS-2000 is happy, does not matter if it's on batteries, the 9180 or both, I can't tell the difference (Unless I look at the voltmeter, it tells me when there is a difference 13+ = 9180, less = batteries)
Now the other advantage: Ever check into a net and as the NCS says "Go ahead (Station before you) Stand by YOU".. You feel the urge to be sitting.... Elsewhere..... Well.. In my shack, you are already sitting there, No need to leave the room or even change seats,, Just lift the lid and drop... Something else, and sit back down.