Yes, it needs to be somewhere neither bunny has been before so that it doesn't smell of anyone's territory. However, if they are outdoor bunnies and you intend keeping them outdoors then you will need to do the bonding outside as well. If you bring them indoors to bond then you will need to keep them indoors permanently until it warms up in spring, then you can move them back outside. So ideally, if outdoors, you should move the pen to an area where neither has been before. Start early one morning and be prepared to supervise ALL DAY!!!!!! A large pile of hay in the middle of the enclosure, perhaps some tasty fresh herbs and then put them both in together and supervise closely. If you need to nip to the loo then have someone else on hand to take over whilst you're not there. If necessary, reduce the space they have because if they have space to run, then they have space to chase and chasing often leads to nipping and fighting.
I always do a 'forced' bond in a very small space because I work full time and have to take a week off work to get the job done!