WR1 Owners Club

Can anyone shed any light on the two cutouts that are underneath the boot carpet. Admittedly one has a sticker on it saying STI Fuel Pump and a date and intials of the person who fitted it. The other looks like a speaker cut out - any ideas ??

Could be access plate for the petrol float?

Mine has a speaker in place, so they can here me coming when im playing ABBA

right hand in the pic (OS) is the access plate for the fuel pump housing and left is the access for the secondary sender unit