Fused 12 VDC access in the dash would be nice.

[RetiredOnPaper]

Or a marked "drill here" or better yet a punch out to access the 12 V battery and perhaps mounting for a fuse block. This would be more in keeping with the DIY mindset.

 

[solartogo]

Lots of external 12V accessories exist, so having a standard "cigarette lighter" (now often referred to as a "power point") socket would be useful, at least as an option.

Which makes me wonder if there is still an ashtray in modern cars, and specifically in the blank Slate, as I haven't seen mention of such. As a non-smoker, I generally use the ashtray only for storage, so other storage spots suffice.

 

[Kit352]

I've just assumed they would have a 12v\5v power center in place in the dash already. If they are counting on people using phones and tablets and Bluetooth speakers for everything they would have to have added in the ability to charge them, including a standard 12v outlet. To do otherwise would be foolish.