Submitted here is a photo of the probable route of Lanihuli Windward.
As of 2010, this route has not been traversed in a number of years. Hawaiian Trail and Mountain Club veteran John Hall has done this with Chuck Godek. According to Hall, Godek was the lead climber, who would ascend, tie off a rope, then beckon Hall to follow. Using this grind-it-out-to-the-top method, they eventually acquired the summit. Year: unknown but probably in the 1950s or 60s.
The access would be from the Likeke Trail, mauka of the Koolau Golf Course.