Front slope up to drivers hatch, entire top of turret, around the turret above the side skirts, and on the engine deck in the large center plate section.
Also on the front side skirts (left and right) you will notice a small inverted half-circle on your kit, this is a small cable that is made for a toe-hold while climbing on the front slope. Make sure to silver it for wear (or muddy it) to show use. Whatever is appropriate for your style.