Welcome to the forum. You live in one of my wife & my favorite cities.
To answer your question on the propane connections. I am no expert on LPG plumbing, but I believe you can split the line any where down stream of the regulator. There are several members here that know alot about LPG hookups & I am sure one or more will post here soon.
Dan Sees, , 2013 Winnebago Journey 42e, 2014 Featherlite Car Hauler 3110 17.5', 2008 Mazda MX5,
2008 Toyota FJ Cruiser,2018 mercedes Benz GLA 250