Does this drive really need both sata and molex power sources?

Was given this old drive by a friend and considering it's size, I doubt I'll use it for anything significant, but out of boredom, I went to connect it to a sata USB enclosure, and it didn't spin up.

I have personally never seen a drive with both types of power sources built-in, so I'm not sure if both are needed, and if they are, what was the logic behind it in 2005?

I have a molex to sata splitter cable if needed, but yeah, since I'm not familiar with this orientation, I thought I'd ask the community what the ideal setup should be to access the drive.

Thanks!