Brother just bought an '87 Accord 2.0 L . I ordered up a Haynes manual, but it won't be here till next week. Can anyone tell me where the A/C service ports are located, and which is low and high? I see the obvious one that is just inboard of the battery, but I was not able to find the other one on first look. Also, what is the correct weight charge of R-12 if the system has been pulled down to vacuum?