Hi! That is definitely a good link! You just need to emphasise why/what about that background/experience has drawn you to the relevant area. In fact, many candidates won’t have a direct connection to such USPs, so it’s fine to focus on the aspects you can link to yourself to show genuine interest in a practice area.
For example: "Having grown up in Nigeria, I have firsthand experience with several companies operating in emerging markets and have observed the unique legal and commercial challenges they face. This background has inspired my interest in the firm’s Emerging Markets expertise, as I am keen to apply my understanding of these markets to support clients navigating cross-border opportunities."