[Elecraft] Static mat repair?

[Darwin, Keith]

I have a static mat but the grounding wire has broken where it attaches
to the mat.  Can the wire be reattached by simply bolting it to the mat?
The mat has some holes in the corners.  It would be easy to put a bolt
through one of the holes and clamp the wire to the bolt.  Or does the
wire need to connect with some conductive substrate in the mat?
 
And where is the current limiting resistor, in the wrist strap or in the
static mat ground wire?
 
- Keith KD1E -