Connect A1-A20, /LDS, /UDS, /AS, R/W with the board (piggy back connector)
Connect DRD0-DRD15, /RES, RGA1-RGA8, /LPEN, /HSY, /VSY, /CSY, DMAL, /INTRQ, CCK, CCKQ, /BLS with the old Agnus socket. (and maybe /BLIT fits /DBR)
Add own DRAM using DRA0-DRA9, /CASL, /CASU, /RAS0, /RAS1, /WE
Wire somehow...