As shown below, you can quickly and accurately mount the Wolf Illuminator on the wall with their exclusive E-"Z" Bar -included with the Liberator, Liberator HiLo, Trimline Plus HiLo, Trimline Plus, Trimline, Trimline Basic, and the Trimline III.
The back of the illuminator already has an E-"Z" Bar taped to it. Remove the bar and note the 2 holes the E-"Z" Bar flanges came out of.
Take the E-"Z" Bar and using a spirit level, mount it on the wall with the flanges on the bar facing out as shown.
Slip the holes in the illuminator over and down one the E-"Z" Bar flanges and you are done.