Managed to get the scart splitter to work with a monster cable. Apparently my pal Xbox gives NTSC 4.43 signal according to the red little light in my PVM 1440qm lol : r/crtgaming
SCART cable | Compra online en eBay
Monster MV3SVSC-1M S VIDEO TO SCART CABLE: Amazon.co.uk: Electronics & Photo
Cable euroconector plano SWV6681/10 | Philips
MONSTER CABLE SCART LEAD 1M X 2 | eBay
BeMatik - Cable VGA a Euroconector 2m (HD15-M/SCART-M)
Cable RGB-SCART MSX2/MSX2+/TurboR - Retrocables - Tienda de cables retro