Changing Prebuild Acer Predator case gone wrong

[kenthenoobbuilder]

So I'm a scrub of a builder and went and destroyed the OEM Acer Predator G3-605 case and tried to install it into a Zalman Z11 plus case.

When trying to connect all the power supply cables to the motherboard I realised that it wouldn't fit as the psu is too far from the mobo.

I also tried to find an extension cable but the psu has a custom 12 pin cable that doesn't have extension options.

 

I'm trying to save as much money as possible as I am a student, any other ways to fix this?

 

(So far, I have thought of changing the mobo and psu)

[Snowglobes_The_Destroyer]

If possible, it would be nice to have a picture of how it looks. As in the current situation of the 2 cases as well as why the psu and motherboard won't fit in. you don't need to try and fit in the psu/motherboard in the cases if you don't currently have them inside. Just a picture of how it currently is and a few more words will probably be enough to help