I've googled for images of 5 1/4 inch drives, but they all show the front, and not the back of these units. I have a 5 1/4 inch drive inside a machine I'm trying to get to boot up, but I can't see the back of it.

The PSU in the machine has 2 free 4-pin molex power connectors. On the photo, the label called "cable in" is where a chunky black connector has been successfully pushed in to the back of the 5 1/4 drive. There's 2 ? question marks on the photo. My question is, is that where I put one of the 2 molex power connectors? I just can't see anything from the angle I'm working at.

(Pulling out the drive would be a bit awkward. I'm guessing there's nothing there for power. Seems like a good question to ask, before unscrewing + pulling stuff out of the case.)

Thanks a lot people. 😀