How can I tell if I have a cable select computer or cable?

How can I tell if I have a cable select computer or cable?
I have a Compaq Presario 5204. The paper manual says if you connect an
additional IDE (hard drives?) to set the jumpers to cable select.
If I understand cable select allows the derive at the end to be the
primary (master and the middle on the ribbon cable the slave. Western
Digital talks about cable select hook up as a cable with a black master
at the end of the cable plug and a mid way plug as being gray. Is that
an absolute specification followed by all cable makers. As far as I
know my computer has never had it's cable changed but both my IDE
connectors are black. And the cable at the end is marked drive 0 and
the middle one drive 1. The cable does have the red strip on the
farthest out wire out for determining the pin it should be connected to
so right to left is not reversed and pins are damaged due to the
missing middle pin?
WD also talks about either using the master and slave jumper or the
cable select jumpers on both drives but not both. Ifs that true for all
made drives? Does it matter that much if both configurations where used
at the same time? Or if either is used not much difference if any in
operation?
Also could a hard drive as in a number three be connected to the cable
middle or end that a CD-ROM is connected? Are second middle cabled
installed CD-ROM drives call master primary and slaves too?