I'm putting cables in and I just cant figure it out. The case APPEARS to be incompatable with my motherboard, even though I was told it was

SO, I'm thinking it's just me being an idiot, so I'm willing to pay someone to finish it for me (whether that be someone on here or someone you know!)
If this is against the rules, sorry, I'm just at the end of my tether

I'm from just outside of Croydon in the UK if anyone would consider it.
The specs are;
Spoiler
- Intel i7 4770k
- Gigabute GA-Z87-HD3 ATX LGA1150 Motherboard
- Kingston HyperX Blu 8GB (2 x 4)
- Plextor M5S Series 256GB 2.5 SSD (The 2nd one hasnt turned up :/)
- Seagate Barracuda 2TB 3.5" 7200RPM HDD
- Asus GeForce GTX 780 3GB
- ThermalTake Level 10 GT Snow Edition
- Corsair CX 600W 80 PLUS Bronze Certified PSU
- Pioneer BDR-208DBK Blu Ray Writer
- Intel Centrino Advanced-N 6205 for Desktop Network Adapter
- Intel i7 4770k
- Gigabute GA-Z87-HD3 ATX LGA1150 Motherboard
- Kingston HyperX Blu 8GB (2 x 4)
- Plextor M5S Series 256GB 2.5 SSD (The 2nd one hasnt turned up :/)
- Seagate Barracuda 2TB 3.5" 7200RPM HDD
- Asus GeForce GTX 780 3GB
- ThermalTake Level 10 GT Snow Edition
- Corsair CX 600W 80 PLUS Bronze Certified PSU
- Pioneer BDR-208DBK Blu Ray Writer
- Intel Centrino Advanced-N 6205 for Desktop Network Adapter
Thank you
