Missing 16 GB cache drive

I ordered a T450s and received it a couple of weeks ago. I opened it now to replace the HDD with an SSD, and I wanted to remove the 16 GB SSD cache drive, which would be redundant now.
The problem is that the cache drive is not there. I'm sure I ordered it, and it showed up on my order. But it is not where it is supposed to be.
I'm not sure who I'm supposed to contact about this. I do not want to return the laptop. I'd prefer that Lenovo send me a cache drive, which I paid for, or at least give me a refund for it.
I've attached a picture of where the missing drive should be. I would appreciate any help that anyone can give me.
Thank you.
http://i.imgur.com/XXNN7Ib.jpg
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so you followed this instruction?
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