I emailed Rus for help. Here's most of his reply...
What happens when you follow my description in the article is that the capacitor remains in the circuit, but you move its output side from where it was--the input to the next stage--over to a piece of small coax that you can bring out the back of the radio to connect to the transverter.
The connection between the capacitor and the coax center conductor is up off the board, "flying lead" style. You need to make sure to strain-relieve the small coax so that it can't rip the capacitor off the board if it's stressed.
Does this help?
Good luck with the transverter. It's that time of year . . .
Rus explains further
I emailed Rus for help. Here's most of his reply...