Aroc,
A lot of times the bees will just huddle close to the old location and stay as a group. If that happens, put a small box with a frame or 2 of comb and they will go to it. Then close it up at night and move and install them in their hive.
With a hive that close, a lot of them will find the other hive and try to move in. If they have nectar or pollen they will be welcomed in. If they are emptying handed they will be blocked like a robber bee would bee blocked. If there are enough of them they will just over run the entrance and move in.
Jim