The Wall Connector requires a WiFI signal, internet connection to receive periodic firmware updates from Tesla. Do you have a decent WiFi signal in the garage that you can use with the Wall Connector?
There are non-Tesla brand EVSE that you could install instead of the Wall Connector for charging your Tesla. Popular brands would include Chargepoint, Juicebox, and ClipperCreek. (I am partial to ClipperCreek.) To use any non-Tesla charging station you would use the J1772 charging adapter that came with your Tesla. (Not a big deal, I use the J1772 adapter when I charge at home and when I use the local Level 2 charging equipment where I frequently go to dine (the parking, charging is free for the first two hours.)
If you decide to install the Tesla Wall Connector the dimensions are 13.6" L X 6.1" W X 4.3" D
The front of the Gen 3 Wall Connector is glass, you definitely won't want to install the Wall Connector where the front glass can be easily broken.
You may want to mark out the planned location for the Wall Connector using painters tape, then use a piece of string 8ft in length to ensure that you can reach the charging port without the charging cable pulling on the charging port.
Pages 13, 14 of the Gen 3 Tesla Wall Connector Installation Manual provide information on the recommended location for the Wall Connector.
https://www.tesla.com/sites/default...ng/Gen3_WallConnector_Installation_Manual.pdf
Most apartment buildings, commercial office buildings in the US use commercial power. Commercial power has three phases; residential power has a single phase. This matters because when you wire up the Wall Connector or other 240V equipment at home you get 240V. However, due to the nature of three-phase power when you wire up the Wall Connector in a commercial installation the voltage will be limited to just 208V. Not an issue but any charging estimates for 240V charging would require at least 13% longer time to charge.