Yea, ran the wires out the back of the enclosure, up through the vac, then up into the dome. I can't remember if I drilled a new hole or used an existing one.
That looks just like the top of my vacuums. I highly recommend that you use a 24 volt Mercury relay to control the power to the vac motors. The Mercury relay isolates the vac motor from the timer, if a motor should short out or fail the timer will not be damaged. In 20 years of using the Mercury relay on our vacuums I’ve never had a vac timer fail, the Mercury relay takes the motor load off the vac timer.