Jackson III 2nd Condenser -How

[jg61hawk]

I read the below in a post on backfiring and didn't want to "hijack" that thread with my question.

Re: Misfire and backfire when hot
Here is something that is easy to try. Connect a second condenser from the passenger side of the coil to ground. Easy with jumpers.

How do you do that, and is this a simple roadside fix / test if you suspect a bad condenser...Do you wire to the coil and how do you ground???

I love the simple tests/fixes like jumping the two lugs on the box to bypass the voltage meter if no spark!!

Thanks.