Last step holding back installation of Alpine CDA-9883 in a Scion TC 2005

[dejavu2280]

I am a complete noob at this, but I attempted to do this myself as I can't afford professional help.

I'm going to have to request instructions for Dummies.

It seems the only thing holding me back is to connect these wires but I am stuck on how to proceed.

Please refer to the attached image. Excuse the crude labeling.

1 will connect to A, that much is obvious to me.

3 seems like it will connect to B but 3 is just a bit too big to fit into B.

I don't know what to do with 2 or C.

Do I need these two items to finish the installation? If so, any tips on how to connect them?

metraonline.com/part/Aftermarket_Universal_wire+harness_AL16-0001

sonicelectronix.com/item_20297_Metra-80-1761.html

(I cannot post the direct URLs because I am a new member)

NOTE: I bought this headunit used and I requested the seller for the plug that came with the HU but he isn't responding.

Thanks in advance for the help..

Click to read more...

 

[robert420 10+ year member]

judging by the picture, "C" i believe is just an accessory. "2" however, i have no clue. if you connect everything to its respective other, and it all works, then you dont need that clip

 

[CrossoverOre 10+ year member]

2 is the rear speaker output. C is the ai-net plug for the alpine probably wont be used here. get the harness and 1 and 2 plug right in.

 

[NIHL8ION]

You need the plug / harness for your head unit, as well as an aftermarket stereo wiring harness to connect the stereo's harness to your vehicle's harness

 

[richericks 10+ year member]

One of these and one of these.