Hello all and I hope everyone is bearing up ok?

I decided to utilise this old Acer tower with its internal floppy to install DOS 6.22 onto a SD card adapter to then transfer it back into my thin t5710 thin client (I know the Acer is a beaut but I like the quick release drives and inside its an Abit IS-10 OEM)
The first problem was the internal video on the Acer was not displaying a screen, so I removed the board and ran it on my bench and finally replaced a faulty stick of ram and all seemed well!
I then refitted the board back inside the Acer tower and rebooted with my original dos 6.22 disk but I noticed the drive light was inactive?
Checking the power cable, I realised I had at sometime fitted a splitter cable to allowed a second drive (Gotek) and decided to remove this cable and power directly and bobs your uncle and the 3.5 floppy is receiving power but not being detected in the bios? I then notice and flipped the floppy ribbon cable that had been inserted upside down and went about my business installing dos.

Now this morning while sat drinking my tea I notice the splitter cable had melted on the 5v at both ends and more or less dead centre (see pics) I'm a little concerned about this? can anyone throw some light on this before it throws some light on me?
Should I buy a new PSU to replace my OCZ600SXS that although is getting on a bit, its hardly had any use probably switched on about 30 times!
I notice the splitter uses AWG22 (41A) gage cable whereas my OCZ psu uses AWG20 (58.5A) so does that mean my SONY Floppy MPF920 rated at 960mA was drawing 40 Amps?

I'm at a loss and any help would be great thank you