🚀 go-pugleaf

On the bottom of both my CoCo 2 and CoCo 3, beneath the cartridge port
area, there's a large regtangular empty space molded into the bottom
caseing (on the CoCo 3, the bottom analog RGB port has a cable "channel"
which leads to this empty area).

Was this area designed to hold some possible future expansion option that
Tandy/Radio Shack had in mind? What purpose does this empty area serve?

I notice that within this said space, there is a pair of plastic standoffs
(for lack of a better term) molded into the case, each with a hole in it,
although it appears that on my CoCo 2 the "standoffs" are a little bit
wider in diameter with larger diameter holes in them.


Any ideas?

Or was this just an area to attach an MPI (multipak interface) locking
plate of some sort?


While I'm asking non-important questions....

How come did the CoCo 1 models have a grounded AC plug, and the CoCo 2 and
CoCo 3 only have a polarized two prong AC plug?