Please help ID this wire

[BBShriver]

My car has this connector on both DR and PAS side the yellow and brown come out under the dash, and the connection continues along the inside of the door-sill into the back somewhere.
The other side of this connection is very deteriorated with cracked/dried insulation in many places and is sure to cause a variety of shorts. Both connectors are currently disconnected, but everything in the car still seems to work.

Any ideas?

[Fast Corners]

When you post please tell us what year and model car you have. This helps us quite a bit when posting answers.

That being said, it appears that you have an early 911 '72-'77 vintage. If that is correct these wires connect to the bottom of the seats. They send a signal to the car which activates the seat belt light and buzzer if I recall correctly. They can be disconnected and removed from the vehicle if the aforementioned warning devices are not required/desired to operate properly.

[BBShriver]

You are correct in your guesstimate of the year.
It's a 73.5 T, Targa. Sorry I should have posted that originally, just slipped my mind.

I didn't even know my car had seatbelt buzzers! The driver's seat has been replaced with a Cobra racing seat, and the passenger's will be as soon as I get around to it.
That said, the wire seems to go behind the firewall (to the engine bay, not trunk), rather than under the seats.

[Fast Corners]

From memory these lines go into the center tunnel and merge into the main wiring harness. The buzzer is a small round silver cannister (about the same size as a 5 pin relay). I believe it is on the passenger side under the dash board.

The wiring diagram is gratiously provided by Pelican. On the diagram the switches and wires are associated with #43, #44 & #46. here is the link:

http://www.pelicanparts.com/911/911_Parts/Electrical/911_electrical_1973_CIS_Part2.jpg

[BBShriver]

Thanks, I'll take a closer look when I get a chance!