Manually Adding To Maternal and Paternal Tabs?

[LydiaGaebe]

I have several matches here in FTDNA who are also matches at AncestryDNA and GEDMatch. We all have well documented paper trails going back to common ancestors. These cousins are between third cousin through fifth or sixth.

Both my parents are long gone and I have no first cousins to test. I would like to manually add these paper trail - DNA matches to my maternal side and see who else matches us.

Thank you