Stereo Help Wiring

[Juttie205 123 2 Cars]

I am having trouble with my stereo at first i had no earth but have now found this as it plugged into earth block on steering coloum but this now needs another earth block does this go other side of coloum near drivers side or is there a place for another block that ive missed.

 

now back to stereo I seem to have 12volts on the yellow which is correct and i have a permanent 12v on the red which i believe should only go live when ignition is switched on is that correct any guidence please.