McConnell amended his organizing resolution for President Trump's impeachment trial at the last minute to give each side three days to make their opening arguments, which can last for up to 24 hours, the same amount of time given to the prosecution and defense during the 1999 impeachment trial of President Clinton.

The GOP leader made another significant amendment to his resolution by allowing the House impeachment inquiry to be entered into the Senate's official trial record - subject to hearsay objections - something McConnell declined to greenlight in his initial proposal. The resolution also allows each side to choose how many people may make those arguments.

reference
House Permanent Select Committee on Intelligence, The Trump-Ukraine Impeachment Inquiry Report (pdf 298 pp), Dec 2019; HTML; no witness transcripts enclosed
House Committee on Oversight and Reform, (unclassified) Transcripts as Part of Impeachment Inquiry, witnesses, subpoenas, statements listing, Oct 2019-present