In order to eliminate the delay on a transfer switch position j1 on the timing board will have to be shorted together. This can be done by soldering a jumper across the board or adding a shunt jumper to the header.
The jumper would be added to the position labeled below.
Here is a back view of board. The jumper would go across these pins, indicated by a red line below:
New versions of the transfer switch may have a different board installed where a wire jumper can be added to a header. In this case, the board is labeled as transfer switch delay.