I pulled they are pretty stuck. will try again. I have the entire braking system off but am learning the hard way that brake fluid gets all over, Ive been wiping it up as fast as possible. should have bought a mity vac and sucked out the fluid i guess.
Soldering gun, sand paper, flux, solder. two main ways..clean wire ends..wipe some flux on..put wires..twisting in tight spiral..heat connection apply solder..it melts covering the connection. Practice first on some wires on a bench until you get the hang of it.
Some like to tin the wires first..cover with solder..then put together and reheat with more solder. Also good for sticking a wire into a hole to attach.