Wiring new aftermarket & DVD retention harness

[irishinontario]

This is going to be a very silly post, but I still need help please, incase i do damage or blow something, or have to re-do everything......

I bought:
- a JVC KD 530 stereo

- a DVD retention harness

- wiring adapter

I am connecting all the wires, colour by colour from the stereo fitting to the adapter, then going to clip it into the stereo

Where to i wire the long ground to?

When it comes to the DVD harness,
Do I wire the retention harness (blue/white and black) to the 2 wires between stereo and wire harness i am currently connecting? (wire the harness to the retention harness before connecting to truck wire)?
Which Aux input on stereo do i use to I plug in the Aux red/white into?

thanks......

 

[irishinontario]

all up and running, the only problems are that i cannot lower the front speakers to spare me SpongeBob Square Pants!

and i have lost the OEM function where the volume drops as the reverse beeps come on