private void connectTools(PluginTool t1, PluginTool t2) {
		ToolManager tm = plugin.getActiveProject().getToolManager();
		ToolConnection tc = tm.getConnection(t1, t2);
		connectAll(tc);

		tc = tm.getConnection(t2, t1);
		connectAll(tc);
	}
Connect the tools in both directions.
Ghidra/Framework/Project/src/main/java/ghidra/framework/main/ToolButton.java