[Xenon]

The description Xenon used as  "two deck of cards " is not used anywhere...

SR5 p. 223 Deckers
A cyberdeck— usually just called a deck—is like a commlink with some extra features. It is a bit bigger than a commlink, about the size of a small tablet or a spiral-bound notebook, or a pair of playing card decks.

SR5 p. 266 Rigger Control Console
A rigger command console, or RCC, is like a deck for controlling drones (or other vehicles and devices). It’s about the size of a briefcase.

[martinchaen]

Just to point out; "about the size of a briefcase" is wonderfully vague. Briefcase sizes are not a standard unit of measure, and just like tablets they cane range in size.

Without the manual controls (video game controller style), screens, and thus reduced power supply needs, I'd allow it to take up the same space as a cyberdeck implant OR a smuggling compartment. Both are reasonable, to my mind.

[Tarislar]

I don't think it's unreasonable for "brief case sized" to be broken down to "breadbox sized."  As Csjarrat pointed out, at least some of the things that make it "brief case sized" would not be needed at all for an internal version.  Just the removal of any need for screens and physical controls should cut it down a lot, allowing the stuff you do need to be stacked more efficiently in a smaller space.

I also don't think it would be unreasonable for a GM to rule it would require two compartments. 

Yeah, I was thinking it was "suitcase" sized, which on average is quite a bit bigger than a brief case.

Actually, a Folded in half Brief Case might be really comparable to a Bread Box,  as such,  I'd agree to mounting it in just a single "Large" Storage compartment.

[FasterN8]

Yeah, I was thinking it was "suitcase" sized, which on average is quite a bit bigger than a brief case.

Hah! Hilarious mental image there, the suitcases I grew up with were large enough to contain a couple small children.   Does that RCC come with rollers?