The ornamental design for a battery side terminalextender, as shown and described.
FIG. 1 is an end view of a battery side terminal extender showing my new
design;
FIG. 2 is an expanded perspective view of FIG. 1 ; and,
FIG. 3 is an enlarged view of the battery terminal extender of FIG. 1 .
The battery and plurality of cables with an end connector in FIGS. 1 and 2
and the end connector for the plurality if cables in FIG. 3 shown by
broken lines in these figures are included to illustrate an associated
environment and form no part of the claimed invention.