You can tap off the hydraulics under the seat. There's a valve you turn for external implements. You'll probably need to T the return line. Some backhoe's seem to be setup to use the PTO to run an external pump. Do some searching on here and you'll find some pictures. The B6100 is the smaller HP version of the B7100. Do you have a loader? What year is the machine, the newer ones are a bit different.
Ah - ha! So that's what that valve is for. Looked all through the owner's manual and not a hint that I could find. Thanks for the info. Very nice power steering thread, too - nice work.