If you are talking about the 5th picture along, the one that looks like this:
I'm sorry to say it
is a greave. Oriental greaves strap to the outside of the leg.
If you have a look at the picture of the mannequin wearing the full armour with the krug cuirass, you can just make them out.
Here is photo I took of one at the Royal Armouries museum.
Here is a complete greave and cuisse assembly. It's from that Osprey book on Ottoman Armies.
Here's a 15th century Turkish cuisse as well.
BTW, that's a nice website you found there. There is a partial embossed krug on the first page.