Unidentified Connector List
There are quite a few common connectors just laying around Astro and Safari vans that aren't connected to anything. They are likely there because it's cheaper/easier to have 1 wiring harness that has the connections for more than 1 model vs having 8 different wiring harnesses to install.
Rear Windshield Washer
Located near the windshield washer fluid reservoir. Commonly found on vehicles that have cargo doors instead of dutch doors as they never had wipers for the cargo doors.
Fuel Pump Prime Connector
Located near the fuel pump relay.
Trailer Wiring Harness
Located in the jack storage compartment, makes it convenient to add trailer wiring to your Astro/Safari van.