Where should we place our sins?

With Easter being here, I figure that now would be a good time to post about sin and the cross.

Why do we say that we are placing our sin “at the foot” of the cross?

Surely, we should be putting our sin UPON the cross.
Or UPON Jesus.

Theologically, this is far more accurate.

As a metaphor, we can come forward to the front to leave things at the base of the cross, but this, in most cases can be just as well represented by attaching it to the cross.

I know, it’s not the most pressing matter in a Coronavirus world, but I’d always wondered why we stick with placing things at the foot of the cross when, in reality, this isn’t where they belong.