Found this;
1. Disable Bluetooth in osmc
2. Connect to Pi trough ssh
3. Don’t connect the PS3 controller yet
4. Evoke
Sudo sixpair
5. Connect the controller trough cable
6. After sync disconnect the cable and press Ps button
7. evoke
Sudo sixad --start
8. After some secs the controller syncs trough Bluetooth (it rumbles)
9. Ctrl-C to stop sixad
10. Install sixad to start at boot:
sudo sixad --boot-yes
11 reboot
If anyone knows this might work?
Also found RetOSMC. But it seems pretty old, not sure if its still a thing?