I was looking through the manual (as I've been doing every night since I placed my order), but today I was actually readining it after I installed my G4 (yay!). On page 8 & 9 of draft 7.5 you have the following swicthed from the pictire to the description below.:
#20 is labled as wiring harness (which is #23)
#22 is labled as the USB dongle
#23 is labled as...well, there is no description for #23, but if you read #20 you'll find it.
This might not make sense, but you'll see what I mean. Thanks again for all that you guys do. My install this afternnoon couldn't have gone any smoother, I'm loving it.