MacPro3,1 can't split power from the 4-pin molex

I got one of those splitter but it won't work.  There are two 2 4-pin molex power plug in the drive bay of the MacPro3,1.  But you need 2 power adapters to convert the 4-pin molex to SATA power.  No luck with the Y splitter for that.  My boot drive, no ask me why, resides on that drive bay, using the power from the Y splitter when both are attached won't even boot up the MacPro3,1.  I mean using the Y splitter is totally fine as long as you only use one of the Y splitter but that defeats the purpose totally, doesn't it?  Got another adapter cable and now the BR drive and the SSD draws power separately and they work at the same time.  Hooray.

MacPro 2008 Blu-ray

Got myself a LG Blu-ray player blah blah blah.

Chuck the thing inside the MacPro3,1.  Unfortunately the machine doesn't want to boot.  After some mildly painful troubleshooting, I think it's the power.  I ran a power splitter from one of the 2 4-pin power cable for the EIDE drive.  It is running OKAY as long as only one of the splitter is in use.  Once I plugged the other end to the Blu-ray SATA, the SSD won't boot.  I guess there is no power going there.  I vaguely remember reading somewhere a year or 2 ago something to that effect.  The traditional or old Blu-ray standard is only 1920x1080, but the newer one can go up to double that, i.e. 3840x2160 or called UHD.  Though my monitor only goes up to 2560x1080.

So I ordered a 4pin molex to 12 pin Sata cable.  Let's see if it works.

When I plug the splitter to both the SSD which is my boot and the BR drive, the BR seems to get the power OK as I was able to see the light and open the tray.

Before I proceeded to install the drive, I needed to remove the front plate from the drive which is a bit of a pain as people mentioned it but there was no clear shot as to exactly how it's to be done.  Well I am guilty of that as well.  All I can say is you need to be careful and do not force it.

Since I can't get the machine to boot if the drive is power plugged in so I can't really test it yet.  Judging from what I read, this model with the 1.02 firmware may just even read the UHD BR disc as well.

UPDATE 1/11/2020:
I am happy to report that, what I thought was right.  The 4-pin molex won't split power.  With separate adapter to the SATA to the SSD and the BR drive, both of them work now.