Lights, ventilation and heating
First, electricity outlets were placed so lights, speakers, fans or heaters could be powered in the greenhouses (it gets hot or cold quickly in the greenhouses). For lighting, we installed dimmable lamps. With a small heater, it gets comfortable quite quickly in the greenhouses, but for extra warmth, we also put blankets in each greenhouse.
Plants don't have hands, but humans do and presumably, humans will want to leave the greenhouse eventually, so they need to open the doors. This is why we placed handles on the inside of the sliding doors. We did this by glueing them to the glass (you need a big surface on the handle to place the glue, or the handles will fall off), but you could also place it with screws on the aluminium of the doorframe. Enough extra material also needs to be available for the doors, because the sliding system will wear out more quickly due to the doors opening and closing a lot more than with normal use.
Adjustments to the weather
With very sunny weather, it might be a good idea to place some sun-protecting cloth over the greenhouses, or perhaps hang it inside, For colder weather, it is important that there isn't a draft, especially via the bottom, where there can be some space between the aluminium and the actual ground. Thick see-through plastic or some other fitting material can be used to better isolate the space.