Fuzion 427 factory inverter switch

[Fuzion toy box]

I am wanting to add an inverter to our unit. I wanted to see where keystone typically located the remote on/off switch. I have seen aftermarket switches as well as magnum control panels What remote switch type comes from keystone and where do they put it inside typically. Is it just an on off or is it a panel like the magnum RC-50l. Thanks.