Attaching 2 greenhouses?

I have a cheap greenhouse that actually works well for me. I would like to “attach” another to it to make it twice as big. Im not really sure how to go about attaching them. My thoughts are to go back of the new one to the front of the old one and just cut out a “door” on the back of the new one to match the door on the old one. But as far as attaching them I’m thinking maybe zip ties and some wide tape to cover the gap all the way around? 🤷‍♂️