It's the easiest way, and the old kits like Eelco were set up like that. The kit had a longer shaft for the center, so that the passenger side of it was sticking out enough to put the main,longest lever on. So, you mostly will see the gas pedal hooked to the driver side of the center carb, and the secondary linkage on passenger side ...except on some early Ford cars where your pedal was already hooked to the pass side of the flathead V8 carb, then you will see some of those cars with all the linkages working on that side. another thing about the passenger sides of real outboard carbs, is that they have a small lever there already, and some people use those to build a connecting link. I've got quite a few setups here, and NOS Eelco kit in package, if you really needed a pic of some particular setup. I have one setup to pull off the pass side for a Ford car, also stock Vac setups, also some that were converted to mechanical progressive back when. .