"slice", "splice"...pretty much the same thing, in this instance!When you get it all sorted out, don’t forget to mark where the slice is in case you have to revisit the location.
...By the way, I use gel filled CAT6 cable with schedule 40 conduit. The conduit is not there to keep water out but for mechanical protection. Also if you use conduit always use direct burial cable since water finds ways to enter the conduit or accumulates through condensation.
"It's not IF water will find its way into conduit...but WHEN."