WWAN for my T61

Hello,

I want to ask about "free PCIe" slot in my T61 7663-DL6
this is what I get from Sisoft Sandra software

Computer Buses
Interface Version : 2.30
PCI Bus(es) : 8
PCIe Bus(es) : 6
CardBus Bus(es) : 1

System Bus 0
Type : PCI
Multiplier : 1x

System Bus 1
Type : PCIe 1.00 x16 2.5Gbps
Multiplier : 3x
Bridge : Intel Mobile PM965/GM965/GL960 Express PCI Express Root Port
Device Connected to Port : Lenovo ThinkPad T61

System Bus 2
Type : PCIe 1.00 x1 2.5Gbps
Multiplier : 3x
Bridge : Intel 82801H (ICH8) PCI Express Port 1

System Bus 3
Type : PCIe 1.00 x1 2.5Gbps
Multiplier : 3x
Bridge : Intel 82801H (ICH8) PCI Express Port 2
Device Connected to Port : Intel Wireless WiFi Link 4965AGN

System Bus 4
Type : PCIe 1.00 x1 2.5Gbps
Multiplier : 3x
Bridge : Intel 82801H (ICH8) PCI Express Port 3

System Bus 5
Type : PCIe 1.00 x1 2.5Gbps
Multiplier : 3x
Bridge : Intel 82801H (ICH8) PCI Express Port 4

System Bus 13
Type : PCIe 1.00 x1 2.5Gbps
Multiplier : 3x
Bridge : Intel 82801H (ICH8) PCI Express Port 5

System Bus 21
Type : PCI66
Multiplier : 1x
Bridge : Intel 82801HBM Hub Interface to PCI Bridge (ICH8M B1 step)
Device Connected to Port : 65024 RL5c476 CardBus Controller

System Bus 22
Type : PCMCIA/CardBus
Multiplier : 1x
Bridge : 65024 RL5c476 CardBus Controller
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I want to ask with the blue highlighted items, are those meant that my T61 have spare PCIe slot? can I add a set of WWAN module (like unlocked sierra mc8775 module+antena+sim card slot) into my old T61?

I took a picture inside my T61 ..
free PCIe slot on my T61

does anyone have experience installing WWAN module in their T61 using middleton's bios?

thank you for your answer