IMU as WAS

Hello everybody!
I’m looking at Trimble WAS and I can’t see any mechanical connections with axle. So in my opinion it runs with some IMU and my idea is to use IMU brick as a angle sensor. We have BNO/CMPS and GNSS heading and mayby in some way use another IMU mounted on axle to have wheel direction? This topic is for tech guys, maybe someone just did this…