The +5V wire pin on the Plus's Analog board connector is position 6 (there are eleven positions so you can count from either side, but technically pin 1 is next to the empty pin 2 position: 1 _ 3 4 5 6 7 8 9 10 11). Pins 7 and 9 are ground.  Page 10 of http://home.earthlink.net/~gamba2/images/plus_analog.PDF for more detail.

You should be able to use T-Tap connectors (of the appropriate gauge) and make it easily removable too!