Steering Steering shaft is “off” ; how can I adjust?

[1979GabeCJ5]

So, I have all the parts to reassemble the horn button on my 79. However, the indexed lock-plate fits basically 180° off of where it should be for the horn button/mechanism to work. I’ll provide pictures. But what would be the easiest way to correct this? Rotating steering shaft somehow?

1st pic: where the lockplate fits on the indexed sheering shaft.

2nd pic: the hole with red arrow is where horn button goes thru. So, it’s about 180° off looking my by the 1st pic.