31 model A rear end question

[Cpuckett]

In the process of rebuilding my rear end. I read that it calls for a pint and a half of 600 W. grease. My rear end has 2 plugs (off set). The top plug is at approximately 3-4 o’clock looking at it from the driver side. The bottom is approximately 5 o’clock. Question, do I fill it up until it almost flows out of the top one?
Thanks in advance!!