I saw that too. I just looked for where my throttle arm said the wire needed to go. Then I drilled it. Strangely enough, it had to go through part of the engine mount. I drilled right through the "flat against the firewall" part of the mount. It works fine. What motor are you using? I went with the O.S. 46LA. An 11x4 Master Airscrew tries to torque roll it! If you are using a 4 stroke, it may be harder to get a straight shot to the throttle arm. By the way, you're not expecting a slow put-put-putter are you? I set mine up with the CG at the front of the recommended range, and she is still the squirrliest plane I've ever flown. The tail is just too short. It will fly very slowly, but is still EXTREMELY RESPONSIVE. Larger wheels are good if you fly off of grass. I put some 3 inch Dave Brown wheels and it's much better. Also watch out for the exhaust spray. Mine soaked the right aileron servo every flight. After the first day of flying I added some makeshift servo covers to keep them clean. I like the Lazy Cub, but I bought it expecting more of a "trainer like" plane. This is no trainer I promise you.

Good Luck,