How To Fit Sub To CD400 Head Unit

[DC_ELiTE]

Thanks Rusty, have to be honest I am a little nervous about the battery bit so maybe you could answer these questions for me? Sorry I am a car novice so if these seem dumb I do apologise!

1) On the battery there is a small bolt which holds the terminal in place, the power cable I have for the sub has a ring connector on it already so I want to just undo this bolt and place it under there. This way I don't actually have to remove the terminal on the battery completely. I just wanted to check this part would actually be energized so will power the sub?

2) When removing this bolt is there a special tool I should use? I.e not conductive or would a simply socket set/spanner suffice?

3) If for some reason when I loosen this bolt the power to the car is lost, am I in danger of anything resetting to the point where it wont work, for example the audio system needing to be coded again? The only reason I ask is I bought this car from a dealer (eden in poole funnily enough) and have recently noticed I do not have the security code information in my manual....I have emailed them already on this.

4) Regarding the fuse for the sub, having had a look in the engine bay I can see there is sound insulation on the back of the bay, would I be ok to secure the fuse onto that? If so would you recommend anything to do this?

5) If I decided in the end it might be better for someone else to do this part, what would you expect to be charged to do this?

Think that's the only questions I have for now!

RE using the piggyback, I am piggybacked onto the fuse which controls the cig lighter already, which is ignition switched as my dashcam and phone do not charge until the key is switched on.