MBPro ruined by cat pee, need to wipe HDD!

I decided it was time to sell my old MacBook Pro 15" (Mid 2010) and discovered it had been peed on by my cat while it had been laying around my apartment! Yes, gross. I opened it up and cleaned it best I could, but there is a ton of crusted gross cat pee all up in it. It does not boot up or seem to take a charge, the mother board is probably toast. The affected area does not seem to reach the HDD which I have removed and assume still works. I'd like to try and sell the machine for parts if I can, but want to wipe the HDD first.

Here's my question for the computer MacGyvers out there: How can I access this HDD with it outside of the computer? Is there maybe a cable I can purchase to plug this internal drive into another computer externally? Can I install it in my newer MBP which is a 15" (2012) model?

Any recommendations on how to proceed would be much appreciated, thank you!

Lots of luck selling the parts after they had been soaked in cat urine. As far as the HDD data being recoverable... you can try placing it in a portable SATA USB carrier or use an adapter to attach it to another Mac and copy your data from it that way.

In order to connect the drive for testing/data recovery you'll need something like this or this. They can also be found at a number of other vendors including Newegg and Tiger Direct.

And suggest using a peg on your nose!