How do I identify top case identifying/part number? (keyboard mouse replacement)

In an earlier post user "Kappy suggested" I visit ifixit.com to learn how to replace the top case.

However, there are so many permuations of this laptop, I need to idenffy the exact top case part in the macbook so I can order the right one.

Only the exact model will work on my laptop according to what I have read on buying sites.

Could someone kindly tell me how to find an indentifying/part number for the top case?

Thank you very much.

Apple MacBook "Core 2 Duo" 2.0 13" (White-SR) Specs

Identifiers: Late 2007 - MB061LL/

Apple MacBook "Core 2 Duo" 2.0 13-Inch (White - Late 2007/Santa Rosa) features a 2.0 GHz Intel "Core 2 Duo" processor (T7300), with two independent processor "cores" on a single silicon chip, a 4 MB shared "on chip" level 2 cache, an 800 MHz frontside bus,

Thank you for your time,