Surface elements were gently pulled out of the terminals with their bases by hand and swapped out with new elements.
Disconnect power source. Bake element held in by 2 bolts, removed with nut driver. Gently wiggled and pulled element out to expose sta-cons and wiggled terminals off by hand. Be careful to not lose wires behind the knockouts in the wall. New bake element female terminal connections pushed into male end wire Sta-cons by hand with gentle but firm wiggle motion. Push new element back in and replace bolts. Allow the element to heat and burn off oil from manufacturing before use.