1985 monte carlo which wires?

I'm installing a Retained Accessory Power Controller from Dakota Digital.  I am looking for the correct wires to tap into.  Here are the wires I am looking for.

Headlamp Switch:  Parklamp ( I found the headlamp switch on the diagram PG 22)

Headlamp Switch:  Headlamp

Here is the wiring diagram I am looking at.  (I am a newbie to this)

Also, it wants me to tie into a 12volt fused constant power with the controller, dual relay and also with a single relay.   I have a feeling I shouldn't just randomly tap into an existing constant wire.  Should I run a seperate fuse panel and hook into that?  Just run directly to the battery?

Lastly, what amp fuse should I use (or be looking for) on the 12v constant power?

How much current does the controller require?   If it is less than 5 amps, the orange wire on the cigarette lighter may be a suitable source.

if you are trying to retain the power ACC (usually the brown wire on most older GM models), why wouldnt you go directly to the red wire that is used to feed the circuit in the first place.

at the ignition switch you could use the red, brown that get connected whan the key normally gets turned on. you could tap the other red at the ig switch to power the RAP "box" since you know that circuit wont be used for anything else (while the key if off) at the time that you are RAP'ing ....

does that make sense?

i just found the item you are installing ...

i dont think what i posted will work for you. sorry.

Any idea which wires for the 'Headlamp' and 'Parklamp'?  That wiring diagram I have linked takes a minute to load up but definitely has the answer.  I just am not certain how to read it correctly.  I thought it was the yellow for the Parklamp and brown for the Headlamp...but I am not certain at all.

Also, I am going to be adding an invertor and a couple other Aftermarket parts and wonder if adding a seperate fuse box might be the best way to handle all the additional power needs.  The sub woofer and amplifier is going to require a 0 Gauge wiring kit to handle the load.  Could I somehow power a fuse box off of that same 0 gauge line that will be running directly to the amp in the back of the car?