in console mode window go to directory with input file then give command

"C:\Program Files\Maple 2022\bin.X86_64_WINDOWS\cmaple.exe" 6conn.txt

adjust the path to program for your version of maple (dont have maple 2022 so check this - may be diffferent for you).

another option is

"C:\Program Files\Maple 2022\bin.X86_64_WINDOWS\cmaple.exe" 6conn.txt > outputfile

puts output in file or

"C:\Program Files\Maple 2022\bin.X86_64_WINDOWS\cmaple.exe" -q 6conn.txt > outputfile

is quiet mode - less output

M:=Matrix([[ m[1,1] , m[1,2] ],
        [ m[2,1] , m[2,2] ]]);

M:=evaln(M);  # clear M

eval(M);  # check - M now just symbol

determinant of A = 48 - independent of p therefore inverse exists for all p