Need help running a power cable.

Hello, I have a 2021 V4S panigale. I want to hook up a radar detector on a quad lock mount. how would I go about powering it up? I know the fuze box under the seat has the ignition On/Off functions but not sure which fuze to hook it up to. if anyone has installed a phone charger or anything similar please let me know how you went about it.

(the Uniden R4 radar detector needs 12V to function)

thanks in advance.