[CA] Confused about my C120/gps interface....

[Joe O'D]

Hello all,
Please pardon my ignorance here, but I need the benefit of some advice from the lightened among us.
I just bought a used C120 mfd with radome and gps antenna from a gentleman who was fortunate enough to be upgrading electronics priot to some major adventure.
However, I digress: my problem lies with connecting my gps to the mfd. the unit came with a black cable with a 5 pin connector, the cores of which are bare, red, green, yellow, and black ( I think). The gps antenna came with a fixed white cable, the cores of which are white, brown, green, and yellow.
Can I assume I just need to connect the two cables, and plug it into the corresponding socket on the back of the mfd for the gps to work, and if so ( here comes the tricky bit) which cores connect to each other? If it's not that simple, what do I need to do? I know I may be asking the relatively obvious, but I just forked out hard-earned cash for this unit and I don't want to mess it up.
Thanks in advance to all those willing to offer help and advice.