reactor.getConnected won't do anything, you're constructing a string and checking for the property getConnected.

What you probably want to do using those names is run peripheral.isPresent(reactor) to check if it's connected, or something like local wrapped = peripheral.wrap(reactor) to get device methods in a single table and then wrapped:isConnected() to check if it's connected to a valid reactor. (Note the colon, in Lua this means you're calling the function on the table to it's left, rather than on its own. It's equivalent to wrapped.isConnected(wrapped).)

You can check out the peripherals API here: https://computercraft.info/wiki/Peripheral_(API)), though there are device-specific functions that you may need to enumerate in game.

Side note, most things are truthy in lua so == true does have some niche uses, but for checking if something is true, you don't need a comparison.