When you change your a&b pillar how do you get to these bolts?

[J_T]

My rocker boxes are solid, but the very tip of my a pillar is rusted so I'm going to replace it and I think I'm going to replace The back part against the rear fender... But there are two bolts from the inside that I can't get to because they are inside the rocker boxes which are solid. They will be removed because I am replacing that inner metal of the inner rocker. Do y'all fool with these or do you just weld them solid?