The term of art is "terminal strip" and "yes" is the answer.
It doesn't make the electrons any happier, but it will make YOU happier.
Here are some pictures of typical "barrier strips" which is the version you want to get. Radio Shack has them, as well as many on-line sources.
Get the kind that has two rows of screws. Run a common wire to a number of the screws along one row, and then attach the wires for the individual loads to the other row, as needed. You can divide the total number of screw terminals into sub-groups. For instance, you can buy a 12 position strip, and have the first 4 positions be the "B" post and the next 4 positions be the "U" post. That gives you 4 spares. You can mix - n - match, according to your wiring scheme. The only tools needed are a long-nose pliers, with a wire-stripping feature, and a screwdriver.
This is a recording: "You ought to buy yourself an inexpensive digital volt-ohm-ammeter, and learn how to use it. They cost upwards of $10 and are indispensable for playing with toy electric trains. Here is a source for them at a price that can't be beat." Get a meter
I have been playing with trains for 60 years, and working on electrical control systems for 45 years. I know nothing about the command control systems, but if you have any questions about conventional electrical issues, please ask.
Go take a look at this page and scroll down to the 3rd and 4th pictures for a very good close-up and typical wiring scheme that would be exactly the way your trains would be wired. There are two feeders (the heavy red and black wires) and the various smaller wires heading off to the loads.
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