HELP! Late model steering wheel ('78-'91) on '75 Blazer

[Gregsmx]

I am upgrading my steering wheel on a '75 Blazer with a later model, '78-'91 wheel. Can anyone help with the horn button wiring?

There is a plunger on the existing steering column.

The old wheel has an assembly that when the horn button is pushed, it grounds a steel ring. The newer horn button has two plates of steel with a male wire clip prong. The horn button does not reach deep enough to activate the plunger?

Any suggestions or help to adapt the horn button would be appreicated.

Thanks, Greg.

[Gregsmx]

The horn button is round, so the wheel is probably from an '89 - '91 model truck.