EXHIBIT 24.3 POWER OF ATTORNEY The undersigned, as Controller of Central and South West Corporation (the "Corporation"), hereby makes, constitutes and appoints E. R. Brooks and Glenn D. Rosilier, and each of them severally, his true and lawful attorney-in-fact and agents, each with full power and authority (acting alone and without the other) to execute in the name and on behalf of the undersigned, in any and all capacities, the Corporation's Annual Report on Form 10-K for 1999 and any and all amendments thereto, to be filed under the Securities Exchange Act of 1934, as amended, and any other documents and instruments incidental thereto, and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities and Exchange Commission, hereby granting to such attorney-in-fact, and agents, and each of them, full power and authority of substitution and revocation in the premises and full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully for all intents and purposes as the undersigned might or could do in person and hereby ratifying and confirming all that such attorney-in-fact and agent, or any of them, may do or cause to be done by virtue of this Power of Attorney. IN WITNESS WHEREOF, I have hereunto executed this Power of Attorney this 19th day of January, 2000. /s/ Lawrence B. Connors Lawrence B. Connors Controller Subscribed and sworn to before me this 19th day of January, 2000. /s/ Judy A. Hall Notary Public State of Texas My Commission Expires: July 20, 2003