can some one tell me what this means

it's behind the junction block

and if memory serves me.... you don't unbolt it.... I thought it unclipped somehow.  We are talking about a 2002, correct?  turning this junction block to access the wire is a pain in the rear and I would suggest going the (-) parking light trigger route.... I've done enough of them so I can finesse the wire into a position to be tapped.... but I advise against it... it's just dug in too deep.  I know it's there... but I once said the same thing.... IT IS, the other option is under the vehicle.... you can find the black yellow wire headed toward the engine compartment along the running board but UNDERNEATH the vehicle.  Do yourself a favor and go the negative route.  As of the last few years I have found that shoving 12 volts down a vehicles throat begs for trouble.  Toyotas, especially the new 2004 Siennas  are highly intolerant to charging 12v into it's parking light system.  In fact... most of the Toyotas these days I use the negative parking light trigger... it's much more reliable.

good..... glad you went negative..... It's the way the manufacturer designed the lights to come on and dadgummit..... you should tell the lights to come on the same way.  Did I just say "dadgummit"? 

Do me a favor.... let me know how your horn comes out.... I loathe Chrysler horns.....Blech! Hack phooey!