tail light wiring issue on my 66.

[66coffin]

ok i have a problem, my tail lights don't work and neither do my blinkers. i checked the blinker switch assembly and all looks good, wiring under dash is in tack but one plug is hanging free, it is dark green and light green wire. i can't seem to find where it might plug in. is this my problem? the wire looks to be the same color as the tail light wire. i'm dumb with electrical so any help would be great, thanks!
ps where is the blinker box thing that makes the blinker flash? i sure as heck can't find mine...