The TT25 mount has 6mm holes and needs a flat headed bolt, see photo for compatible types. The TT25 can attach to the mount with the screws that were supplied with your bass shaker, or you can use M3 screws and nuts.
Heusinkveld Sprint Haptic / Rumble/ Bass Shaker Mounts
Heusinkveld Ultimate Haptic / Rumble/ Bass Shaker Mounts
Trak Racer Haptic Bass Shaker Kit
Track Racer Haptic Bass Shaker Kit - with Universal Seat Mounting Bracket Black
Powerful Bass Wireless Over Ear Bluetooth 5.1 Headphones Deep Bass Headset
