How were dogs connected to dog sleds?

Answer 1

well Inuits attached their dogs to sleds using ropes made from seal guts

NO! This is not at all correct! "Seal guts" were considered food. Historically and even today many arctic mushers still use very long (up to 18 feet) thin strips of bearded seal to create the "tuglines" that attach from the back of each dog's harness to the "bridle" that attaches to the front of the "qamutiq" (sled). This long material was actually ONE piece of seal hide. Although the bearded seal is only about 9 feet long, the strips were cut in a circular pattern going around and around the seal's body from head to tail allowing for one long continuous piece of leather. Each tugline was made with a loop at one end for a bone or antler toggle at the end of the sealskin harness to go through. The other end had a piece of bone or antler with a hole in it through which the leather of the sealskin bridle went through to attach all the tuglines to the qamutiq.

Answer 2

Most likely in the polar circle in Russia and present day Canada and Alaska