broken board

I am replacing the speaker terminal on my old MCS 2250 (essentially a Technics SU-Z400), and broke the PCB when removing the old terminal like a n00b. Real hatchet job. But seems like I only have one trace I should need to connect? Or are there others? I added a red line where I think I need...

I am restoring a buddy’s Hartman Kardon 730 twin series receiver today and I’ve found why none of the external inputs work: the rear panel RCA jack input board is physical cracked or broken and that has broken traces and interrupted the circuit path. I’m thinking I can clean the two...