Hello and welcome to JustAnswer.
My name is Vladimir.
The cylinder block drain plug is located on the LH side of the engine block ( below freezing plugs level) . Please see illustration below:

This picture is like a side view of the LH side of the engine block.
You will need to lift your Jeep on a hoist or to get to the plug from underneath .
It is located on the LH side of the engine block in the area where the exhaust manifold is connected to catalytic converters.
BTW, are you talking about a drain plug or engine freezing /expansion plugs?Vladgmru41083.6314306713

OK, so my answer is correct . I gave you information about engine block coolant drain plug. Check driver side of the engine block from underneath and you will find it.
Please let me kow if you need more assistance.

No, it is not directly under the driver seat, it is closer to the front of the car but on the LH side of the engine block. You can't see it you remove the LH front Wheel , you should get under the car, then find the engine block ( in should be easy ) and then you will see exhaust manifold that may cover clear vision of this plug. Just inspect the LH side of the block and you will easily recognize it, especially after these two pictures I provided.
I tried my best, XXXXX XXXXX not know how to explain it better.
If you still feel that my answer is not clear, just let me know and I will opt out.
Kind regards,
VladVladgmru41083.6656918171

Hi Andre,
I see you you gave me a negative rating for my services so I suppose you still haven't found the drain plug.
I am so sorry that you are not happy with my answers although I've provided you with the exact location and even supplied some illustrations to support my explanation.
I wish I didn't pick and answer this question at all due to this negative rating.
Good luck .
Vlad