added square furniture (?) spacers with 2 holes instead of original spacers under 2 remaining bolts, connected them with zip cable ties
front secured 😂
rear one: found a 2 holes on the center side closest to the shield at around the middle of the heat shields length
zip ties through
connected several zip ties together, wrapped around with aluminium foil, got it on top of exhaust (extra layers of aliuminium foil on zip ties just above the exhaust), connected zip tie chain to the front zip tie between 2 bolts
turned the engine on - no more noise.
might last for a while, i need fix it properly.
final question: is the heatshield aliuminium?