What goes in Bell housing countersunk hole?

[Corey Bowcutt]

There is a countersunk tapped hole in the bell housing just above the clutch fork as pictured below.  What if anything should go in this hole?

Thank you,

Corey

[Bob Gaines]

There is a countersunk tapped hole in the bell housing just above the clutch fork as pictured below.  What if anything should go in this hole?

Thank you,

Corey

It is left unused on a Mustang application.

[Corey Bowcutt]

Thank you Bob.