bazooka el8a in a 2004 ford f150

First of all, if your reading this thank you for taking the time to help.  I've search on this site, the SAS Bazooka website, and others in order to correctly wire up my bass tube for installation.

My truck is a 2004 Ford F150 (new body style) with the stock headunit and stereo system.

Off this website I discovered this, the wiring harness to the HU diagram:

Radio 12v lt. GREEN/ purple   +   radio harness

I have a line-level converter (LLC), but what I am unsure of is which wires I should connect to which.  The LLC has four wires right(+), right(-), left (+), and left(-); do these wires get connected to the LF and RF speaker wires?  For instance my LLC right(+) would be connected to the RF speaker WHITE/ lt. grn wire and the right(-) and the right(-) to the RF speakerdk.GREEN/ orange wire? 

The bazooka tube wiring has both RCA plugs (female) and the wiring for the high and low inputs; so once I install the LLC (which also has RCA female plugs) would I only need to connect the RCA plugs from the LLC to the wiring harness RCAs via a double male ended RCA cable?

Lastly, concerning the tubes power source, if I wanted the tube to be powered when I have the key in would it be advisable to connect it the Radio Ignition pink/black or lt. GREEN/ YELLOW wire or is there a better solution?

Again thank you for any insight.

Call it a LOC and everybody will be on the same page.  Line output converter.

Yes.  Or you can connect directly onto the speaker terminals (if the doors are opened up) and not have to mess around with locating OEM speaker wire colors.  Use common speaker wire and run it to the LOC location near the amp.

It is common practice to use a short length of RCA wire (which has male plugs on both ends) to connect the LOC to the amplifier.  So, yes.

Connect to any 12V switched wire under the dash.  Find if switched by metering the wire with your meter's red lead while the black lead is grounded to chassis.  The meter will show ~12 DC volts with the switch turned to ACC or ON, but will show nothing if the ignition switch is off.  Sometimes a switched wire may be found close to the sub's mounting location, so probe that area first.  Once you have established the turn on wire connection and soldered it into place, fuse the turn on wire with a 1 amp fuse.

Stevdart...thank you.  As you can probably tell I don't wire things up much and you have eliminated all my confusion.  I appreciate it.