What adapter do I need to buy here?

All,

I've opened up a second hand Inspiron 2350 I recently bought. The HDD and mSATA were removed, and it looks like the interposer was removed too.

What I'm left with is 7+15 copper blades sticking out. The caddy is for a 2.5 inch HDD, but has no kind of adapter or socket with it.

What kind of HDD or what kind of adapter/interposer do I need to buy in order to get some storage running?