The ornamental design for a mainhousing for opticalsub-assembly for transceivers, as shown and described.
FIG. 1 is a top, front and left perspective view of a main housing for optical sub-assembly for transceivers showing my design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a bottom, rear and right perspective view thereof.
The broken line showing of the main housing for the optical sub-assembly for transceivers is for the purpose of illustrating environmental structure and forms no part of the claimed design.