You have three contacts in a row on the timer. Trace the wires, the middle wire is usually the power wire, and it should be yellow and thick, that one goes in the middle terminal. Now check the dial for a cool down period, turn timer to it, usually near the end of the cycle. You should now only have continuity between the yellow wire and one of the other two terminals, your motor wire goes there, usually blue. The red wire now goes to the other terminal.
The other wire goes to the left over terminal.
There is only one phase of power to the timer so it is difficult to cause a short if you mis-wired, however, before turning power on, verify with an ohm meter, that you don't have a short across the L1, L2 power lines.
Also, these wires should naturally be near the correct terminals as they usually set up or have a permanent bend.