My memory's a bit shakey too after 40 years but I'm absolutely SURE that inner yoke is the nose-wheel steering control. (The hydraulic anti-skid brakes were rudder pedal operated - I think maybe the MR 2 version had hand operated pneumatic brakes ?)
Was the lever on the LH side of the cockpit in front of the throttle quadrant ? If so, it was the flying control gust-lock engage lever .