Please recommend a testing tool for this type of fibre (see attached images)

I need some way to test the fiber cables in the data center I service. I do not even know what to call the cabling we use so I'm uploading images.

https://drive.google.com/file/d/1yZ6ik6V69y4u0E3vO---0vNtCzwvYun0/view?usp=sharing

https://drive.google.com/file/d/1cAJbHD9LK0X6hak4Fvm7HkNDoyp9GJF5/view?usp=sharing