Not sure if the bluetooth will output, it's probably set to input only (so your cellphone audio will go to the radio, and out the "car" speakers, not radio bluetooth out to bluetooth speaker). The Q&A says it will, but the description etc says otherwise (and maybe the translator didn't get the real question).

Do you have a hole to mount it in? They make kits if not:

https://www.amazon.com/dp/B07JH9GVVF?ref_=cm_sw_r_cp_ud_dp_RWFX595XBCYCSMZGKTH1

Otherwise, just ground, accessory, and constant power (and antenna if you want radio, and you might have to do speakers as mentioned)

Also, the radio linked doesn't seem to actually support car play, it does car mirror like a lot of cheap ones do. (Even though the title says it, the description and reviews say otherwise, be careful!) although I see a bunch of other radios that say it more explicitly for even cheaper if you search.