A liquid crystal display module includes an observation region to allow a visual inspection be performed after bonding of the substrates for inspecting the sealant that may be otherwise blocked by the common voltage line. Each cartridge includes front and rear side surfaces which oppose leading and trailing walls of a pocket formed in the milling body. The activation unit includes a pump unit, a pressure circuit with an unloader valve to selectively permit fluid to pass from the pump unit to the wellsite component, and an accumulator bank operatively connectable to the pressure circuit to store the fluid under pressure for passage to the wellsite component whereby the wellsite component is selectively activated.