If its going to be repaired at all it should be done correctly. In the first photo that would involve removing the cable end patch material and opening up the cable end pocket again. The end of the steel cable then needs to be greased and have a plastic end cap installed. Then grout the open cable end pocket back in with non-shrinking grout cement.

The second photo looks more like a nail that held one of the cable end flanges to the form board rather than a cable tendon end. If it is a cable end, then the above procedure all over again.

The way these will most likely be repaired if they are repaired at all will be to butter over the spots with a little more grout cement to hid the rusty spots that are forming.