92 Johnson 55 Lower Carb Bowl Fuel Nipple Connects to?

[Shinyboat]

Upgrading a 91 Johnson J50JEIA 50hp to 92 E55RWLENM 55hp carbs. The old 50hp bowls are plugged. The new lower carb has an extra fuel nipple (#22) facing the air box (it clears below). What is this supposed to connect to?

 

[racerone]

The 55 was likely a manual start motor.----That nipple is to feed fuel to a manual primer pump.

 

[Shinyboat]

The 55 was likely a manual start motor.----That nipple is to feed fuel to a manual primer pump.

Thanks. Ill take a plug off the 50 carbs then.