1972 Plymouth Duster 340 Firewall Help!!

This is my '72 duster's firewall. Factory A/C. Notice the huge blower motor hole. Also the spot where the A/C lines go through the firewall is different. The two vertical holes to the left of the wiper motor are my A/C lines. The two horizontal holes are for heater hoses.

Of course, mine is a US car, if that makes a difference. You don't even seem to have heater hoses, so maybe the whole arrangement is different. In fact, it PROBABLY is.