I have two T10s and both use an RHP. I have the probe hanging on the warm side under the RHPs. One of the probes is through a hole I drilled and the other is coming in where the power cord comes into the enclosure. My advice would be to 'temporarily' tape the probe to different locations inside the enclosure and take your temps. Once you have settled on the location which best gives you the temps you need, you can then decide if you need to drill a hole or route the probe through a pre-existing hole.