For the address HC573 ICs, tie the LE pins high and the OE pins low, this will make the latch transparent so it acts like a signal buffer.
For the data HC573 IC, tie LE high and connect OE to pin 20 of the socket. The 'D' inputs go to the EPROM and the 'Q' pins go to the socket, remember you send addresses to the EPROM but you read data from it so the buffer has to be the other way around to the address signals. You can either tie pin 20 of the EPROM to ground or to pin 20 of the socket, it will work the same either way.
Brian.