As has already been stated, the V6 has two drain cocks, while the 230ft et al has one (in the back bottom of the block by the cat down pipe). The drain cocks look like old garden hose ends; basically like copper or brass colored (though they may be black with oil gunk cover) and like 2" long or so.

You unscrew the cock and coolant flows out. To control it you can slip a piece of old garden hose over the end of the cock and put the other end in a bucket (helpful if you aren't on a lift).

good luck,
rt