If you have old cars too, one option is to place a knuckle coupler on one end of one of your cars so it will mate up with the knuckle on the loco. Then the hook horn end will mate with the rest of the old cars.
This is what I have done. I have a lot of old cars with the hook couplers. Since detailed realism isn't critical to me, this method serves me just fine.
I also have several newer cars with knuckles that I can fit in near the head end of the train, and then place the combination-coupled car to connect the rest of the consist.