If there is no power near the camera mounting spots, then you could only go with bettery-powered cameras or solar powered cameras. But be noticed that battery powered cameras and solar powered cameras work only based on motion activated, they do not work 24/7.

For batter powered cameras and solar powered cameras, you can check about arlo, reolink, kittyhok and xmartO.

For example:

https://www.amazon.com/Kittyhok-Wireless-Rechargeable-Detection-Weatherproof/dp/B08Q7RCFZC/ref=sr_1_15?crid=1RMW83HNY423K&keywords=kittyhok&qid=1639725559&sprefix=kittyh%2Caps%2C548&sr=8-15

​

If you need battery powered camera system, check about Arlo.