The ornamental design for a device for connecting a television with an externalsignalingsource, as shown and described.
FIG. 1 is a top perspective view of the device for connecting a television with an external signaling source;
FIG. 2 is a bottom perspective view of the device for connecting a television with an external signaling source;
FIG. 3 is a top view of the device for connecting a television with an external signaling source;
FIG. 4 is a bottom view of the device for connecting a television with an external signaling source;
FIG. 5 is a left side view of the device for connecting a television with an external signaling source;
FIG. 6 is a right side view of the device for connecting a television with an external signaling source;
FIG. 7 is a back side view of the device for connecting a television with an external signaling source; and,
FIG. 8 is a front side view of the device for connecting a television with an external signaling source.
The broken lines shown in the drawings depict portions of the device for connecting a television with an external signaling source that form no part of the claimed design.