To fixate the holder in your motorcycle you need to have some sort of AMPS pattern base to secure the holder to it.
If you have a navigation tower chances are it already includes an AMPS base.
If you do not have any type of AMPS base, you need to have some sort of structure with a rod and buy an AMPS base to hold the tablet to it.
An AMPS base can be acquired here: https://www.thorkracing.com/en/produto/amps-base/
If you do not have any structure/rod to connect the AMPS base you should search GPS Holders specific to your motorcycle, usually the GPS holder will have what you need.
Alternatively you can check our handlebar brackets which all include AMPS base: https://www.thorkracing.com/en/produto/tablet-fixation-bracket/