Just give them more time. There's no point in rushing things at the beginning of a bond that will last a lifetime. They have to sort things out between themselves in their own way. There is bound to be a bit of getting used to each other and trying to work out who's boss, etc. If they both remain OK and there are no full on fights, things should work out eventually.
I had one bond that took about an afternoon - the time it took to collect one and drive them both home in the same crate. Mostly it takes a few weeks, but these days I tend to take it very slowly - so tending towards months rather than weeks.
I had one bond that took about an afternoon - the time it took to collect one and drive them both home in the same crate. Mostly it takes a few weeks, but these days I tend to take it very slowly - so tending towards months rather than weeks.