Replace 2 Bathroom Fans with Cover Plates

Hi, I need a handyman to install TWO new 100mm timer fans in my bathroom/ensuite (I have already bought both fans).Important Details (See Photos):The ceiling plasterboard is intact, but the old fan footprint was 27cm* 27cm(leaving unpainted yellow plasterboard) and the duct is offset near the wire hole. The new fan cover is only $16.5cm*16.5cm, so it cannot cover the unpainted area or the wire hole on its own. What You Need to Bring & Do: Bring two white PVC/acrylic plates (at least 28cm*28cm). Cut offset 100mm holes in the plates to align with the existing ducting, mount the plates to cover the 27cm footprint and wire holes, then mount/wire the new fans on top. Wire both 3-wire timer fans and test light-switch activation and delay timers.