The integrated bow sack is a little more involved but still fairly eay to do. First locate the overflow off the KGB found in the pic below.
Unscrew clamp and disconnect overflow hose. This hose will be pulled through the instrument panel and serve as the overflow for the bow ballast. I took out the straight black fitting going to the ballast tank and replaced it with a 90 as my new hose fit right over it without effort and I wanted a snug fit. Here is the same view with the new 90 and hose attached.