Hi. Can anyone please tell me what type of end connection this is? I've made the trip to Radio Shaq and they don't have it so I'm at the end of my rope with this. Most I know is it's 1/4". Better yet would be a link to where I can order some of these here on the net. If RS doesn't have it my amateur self has no clue where to go to find some of these. Thanks!

 

Go to Autozone. It is an automotive spade lug.

 

Or a HVAC supply house I'd try Autozone or Home depot. They both should have them. Here used to tap off the power for something else on car's a lot.
fog light running lights even them blue led's you see under cars.

 

.250" quick connect (faston) terminal.
That specifically is called a "piggyback" because of the male/female terminals in one piece
and being that the insulator is red its for 22-18 AWG wire

 

Sorry, here's the connection...

 

You already posted the picture??
Do you need more help?

google "250 faston 18-22 piggyback insulated"
or here..
http://www.digikey.com/product-detail/en/MVU18-250DMFK-A/920084-03-ND/1952091