Question Ideas for an extra Power SATA Connector on Integra M PSU?

Feb 20, 2019
Hello, I need your advice on the following issue:
I have 4 HDDs and 1 SSD. My PSU is Integra M 550 W, which has exactly 5 Power Sata Connectors. The 650 W model has 6, but little did I know when I bought the 550 W model. Now I need 1 extra Power SATA Connector - to install a Blu-Ray writer drive. On my mainboard (ASRock Z170M Extreme 4) I have 6 SATA ports, so there everything is fine, I just need power for the Blu-Ray drive.
Is there any way to split the existing 5 SATA connectors and make them 6? With something like this -

Or can't I just buy a modular cable with 6 Power SATA connectors?

My main concern is will the PSU "handle" properly those two solutions or there is some risk? I would really go nuts if my HDDs "catch a cold" and f*** up.
If there's a risk I'll try to make the internal Blu-Ray drive into an external with this -

Thanks in advance for all the help! Keep up the good work :)