Correct spotlights and correct halogen lights for 86 DPS?

[ChrisL]

This is the stuff that is braille to me, so bear with me.

Two rear-views, check. Where should I check in the headlight harness for a split-off for wig-wags?

Also, would a Federal BP100 speaker be correct? Any idea where it would mount? And does anyone have the faintest idea how they attached the Decatur (which I think I will use) and the Responder to the dash? I don't usually see screw holes...

From pictures of the '83 on this site, it looks like the GE radiohead and PA200 should be mounted under the dash, in place of the ash tray correct? But leave the cigarette plug in for the responder?

Sorry for the questions here guys.