Your thinking is probably right, but because you need to replace the damage on the board, you have to measure on the board and attach the jumper between two pins/components on the board. If those components are surface-mount, a very finely tipped soldering iron may be needed, too.
Depending on what the damage is, it may be easier to just patch the trace that has been damaged. You may be able to scrape off some solder mask on each side, and patch up the damaged trace so that it makes a connection again.
Else you'll probably need a multimeter (or at least continuity tester) to figure out what parts should be connected, but aren't, and make that connection.