One MIGHT do it without removing the oven, I guess, but it's much easier access with the oven, the bottom closeout panel, and the lawn chair cabinet liner removed.
Removing the oven is EASY. There are four screws into the countertop and one gas line to remove. Then the oven slides forward until clear of the fuel line. I actually bought this oven new-old-stock in the factory box on Ebay. I paid as much as I would for a modern oven, but it appealed to me to have a brand new 25-year-old stove.
This installation is still in progress, by the way.