
If you have never swung out your PSU swing-out contraption, this is what it looks like. Always triple check that your cables are routed such that no cables are being pinched by the PSU swing-out contraption as it is opened and closed. Since your 'visible' SATA power cables are both routed down to the bottom of your case to power those drives, you will need to route another SATA power cable to the top portion of your case to connect the 6-Pin Slimline adapter to SATA power, and the other end of the adapter to your optical drive. Your PSU should have come with 4 SATA power cables that connect to your PSU in the ports labeled "Peripheral & SATA", and each of those cables should have multiple SATA power connectors. Select Troubleshoot > Advanced Options > Startup Repair. Select Troubleshoot > Advanced Options > Uninstall Updates. This will bring you to Windows Recovery Environment. One drive has a blue SATA data cable, and the other drive has a black SATA data cable. Microsoft Cloud Fundamentals: SharePoint Online, OneDrive and TEAMS Office 365: Sharing and Collaboration Learning Path (This link has links to OneDrive, SharePoint and TEAMS trainings within it. While holding the Left Shift key, click the Power icon > Restart.

Each of those drives has a SATA power connection direct from the PSU. You have 2 drives in the bottom of your case. The 6-Pin Slimline SATA power adapter connects to the optical drive immediately adjacent to the SATA data cable connection.

I cannot tell if the data cable is connected to the optical drive because the PSU is in the way, and the photo is small. Follow your red data cable to the back of the optical drive. Lay the computer down on its back side and open the PSU swing-out contraption to expose the innards. You should disconnect the power cord from the PSU and disconnect your monitors, and any other peripherals.

It actually is easy to get to the optical drive.
