Board: 180×140mm rectangle, 3mm corners, 4 copper layers: Top signal/high-current, Inner1 GND plane, Inner2 power plane, Bottom signal.
All components are Top-side. Six battery terminals form an accessible bottom-edge row with K1-K6 arranged by channel; J7/HOB are at the BAT_BUS end. J8/J12/J13 are on the opposite edge.
J9/J10 are horizontal rows at y=52.62mm and 37.38mm, nominal row-center distance 15.24mm. The placement engine clamps their x center to 67.70mm to keep the complete socket footprints inside the board, leaving about 10.55mm to the right edge for the outward antenna-clearance extension.
A 23.5×18mm module envelope and right-side antenna keepout marker are present. The antenna is right-facing; no components may enter the module/antenna zone. The right board-edge margin provides the requested conservative ~10mm forward clearance.
BAT1_POS…BAT6_POS, SELECTED_BAT and BAT_BUS are tagged 15A power nets. Final implementation must use wide pours/busbar or soldered copper reinforcement; do not rely on ordinary inner-layer traces.