If you are talking about the Solomons slot between Guadalcanal and Rabaul, very little happens before the US invasion on august 6. You would be better off setting up close to Rabaul or Truk and waiting.
Historically, the Palaus-Rabaul convoy line ran from the Palaus to a point where the equator intersects longitude 150 then south to Kavieng, but I doubt it was active in july 42.
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