Which partition to install TWRP to for Huawei G510?

[MoonriseWarrior]

Hi,

I recently tried installing TWRP on my phone, but it warned me of the partition, I clicked yes to see what would happen, and it said that it failed. Which partition should I install to? Help!!!

 

[MoonriseWarrior]

Help, people! This is important. Also, I discovered pressing "no" closes the app.