Most important is the the color of the connector. You will want the light green connector. This will allow enough BTUs to flow so you can run all your gas appliances at the same time.
"There are differences that the colors reference for the Type 1 Propane connectors based on the spring tension and flow rate.
The light green connectors are rated for Rated for 200,000 Btu per hour. The black are rated for 70,000-100,000 Btu per hour. The dark green are rated for 450,000-500,000 Btu per hour. The Red connector is the strongest spring and is often used for high pressure adapters and T-fittings." per etrailer
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