Shimano right? If the lever has fluid you might get away without having to, if you don't you might get away with whacking the bleed cup on and burping a few bubbles out with a bit of vigorous pumping. If you do need to bleed I'd just push some fluid up from the caliper through the lever into the the sightly filled bleed cup, close the caliper and burro burp away as above, hopefully all good.
Shimano right? If the lever has fluid you might get away without having to, if you don't you might get away with whacking the bleed cup on and burping a few bubbles out with a bit of vigorous pumping. If you do need to bleed I'd just push some fluid up from the caliper through the lever into the the sightly filled bleed cup, close the caliper and burro burp away as above, hopefully all good.