i'm assuming you're talking about probe placement, correct?
NO TAPE INSIDE A TANK, EVER! sorry for the caps, but this is critical knowledge that somehow gets overlooked.
you can't place the thermostat probe in the tank because with a snake moving around it creates variables that can mess with the thermostat reading and cause a temp spike or drop, e.g. urine, poop, pushing substrate, etc.
the probe should be sandwiched between the UTH and the outside bottom of the enclosure. you can use aluminum tape to adhere the wire to the bottom or the UTH itself but you should not tape OVER the probe head so that it's covered.
i've never heard of a UTH probe being a fire hazard; they're designed to be around heat. the whole point of using a thermostat is to eliminate burns and avoid fire hazards as the thermostat will not allow the UTH to become hot enough to be hazardous.