The said industrial design consists of the shape, configuration and ornamentation of the terminal box for solar cell module as shown in the drawings; the terminal box for solar cell module presents a box-like configuration with rounded corners, a generally flat front and generally flat top surface, a generally flat rear surface with a central large rectangular opening therein; a pair of generally identical cylindrical projections extend downwardly from the bottom surface of the module; each cylindrical projection merges into a generally hexagonal element with a central circular opening in the end surface thereof; the side surfaces of the module present generally identical raised sections with generally parallel upper and lower wedge-like portions and a bridge-like portion extending between the upper and lower wedge-like portions.Representations of the design are shown in the figures wherein:Fig. 1 is a front elevation view of the design of a terminal box for solar cell module;Fig. 2 is a rear view thereof;Fig. 3 is a left side elevation view thereof;Fig. 4 is a right side elevation view thereof;Fig. 5 is a top plan view thereof;Fig. 6 is a bottom view thereof;Fig. 7 is a first perspective view thereof; andFig. 8 is a second perspective view thereof.Diagrams of the design are included.