I wanted to add a therm cable port on my '99 WSM and decided I would use Weber's location on the 2014.
It's 3-1/2" triangulated from the two adjacent grill strap bolts.
I also wanted something smaller than the OEM port so I could avoid drilling a large hole.
The smallest hole that the Maverick cables can enter is a 1/4" I.D. grommet.
High temp grommet rated for 500F
Measuring the grommet
Measuring the Unibit and marking the step above selected cutter
2014 therm port location
Hole is finished and ready for some paint touch up
The Unibit cuts a clean hole. An 1/8" standard high speed bit was used for a pilot hole.
Grommet installed
Maverick food probe inserted and grate probe going in beside.
It's a snug fit but not severe as the second probe goes in.
Someday I may opt for the "notch" (above) but this port will always be useful to gain access to the lower grate.
For comparison here's that big "horse eye" on the 2014...