Accessory base

FIG. 1 is a front perspective view of the accessory base showing my design;

FIG. 2 is a rear perspective view of FIG. 1 ;

FIG. 3 is a right side elevation view of FIG. 1 ;

FIG. 4 is a left side elevation view of FIG. 1 ;

FIG. 5 is a top plan view of FIG. 1 ;

FIG. 6 is a bottom plan view of FIG. 1 ;

FIG. 7 is a front elevation view of FIG. 1 ; and,

FIG. 8 is a rear elevation view of FIG. 1 .

The broken line disclosure represents portions of the accessory base that form no part of the claimed design.