Trunk mounted battery

I am having an issue now Cracked. The wire that is suppose to go to a switched 12 off of the CD relay, I can not figure out where to hook it up because everything that get's power in the car does not get any power until this wire gets power, if that makes sense. This means if I was to hook this wire up directly to the battery, everything that is switched 12v can now get power when I turn the key. However, if I hook this wire up to a switched 12v, nothing would get power.

I can tell when the CD relay has power because it "clicks". Is this relay suppose to make the clicking sound and stay locked on or click on and then click off?