I use these:

https://www.amazon.com/dp/B01LAIBF2M/ref=cm_sw_r_cp_api_i_.mJ0CbJK8BP9J

I also built a DIY suction cup mount off of a video I watched on YouTube using a Bondo dent puller from Walmart (around 8 bucks). If you wet the suction cup before you put it on the glass, you could probably hang off of it.

And one of these:

https://www.amazon.com/dp/B017N6Y08Q/ref=cm_sw_r_cp_api_i_wqJ0Cb6JWK3D1

The camera kit at the top comes with all the rest of the parts you would need.