Allow SMB via two pptp connected Routerboards (RB751Uh-2HnD)

Good Day,

I am trying to enable SMB support for hosts between two Routerboards which are connected via pptp vpn.
I can access the server from 192.168.2.0/24 to 192.168.1.5 but not to any of the other hosts in 192.168.1.0/24 segment. The same is for opposite. Should I add some additional routes in both endpoints and open 137 and 139 port ?

Thank you.

192.168.1.1

[user@192.168.1.1] > /ip address print 
Flags: X - disabled, I - invalid, D - dynamic 
 #   ADDRESS            NETWORK         INTERFACE                              
 0   ;;; default configuration
     192.168.1.1/24     192.168.1.0     bridge-local                           
 1   11.22.33.44/24   11.22.33.0    ether1-gateway                         
 2 D 192.168.20.1/32    192.168.20.2    <pptp-serviss>                         
[user@192.168.1.1] > /ip route print       
Flags: X - disabled, A - active, D - dynamic, 
C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme, 
B - blackhole, U - unreachable, P - prohibit 
 #      DST-ADDRESS        PREF-SRC        GATEWAY            DISTANCE
 0 A S  0.0.0.0/0                          84.237.234.1              1
 1 ADC  11.22.33.0/24    11.22.33.44   ether1-gateway            0
 2 ADC  192.168.1.0/24     192.168.1.1     bridge-local              0
 3   S  192.168.1.0/24                     192.168.20.2              1
 4 A S  192.168.2.0/24                     192.168.20.2              1
 5 ADC  192.168.20.2/32    192.168.20.1    <pptp-serviss>            0



192.168.2.1

[user@192.168.2.1] > /ip address print 
Flags: X - disabled, I - invalid, D - dynamic 
 #   ADDRESS            NETWORK         INTERFACE                                                                                                                
 0   ;;; default configuration
     192.168.2.1/24     192.168.2.0     bridge-local                                                                                                             
 1   55.66.77.88/24   55.66.77.0    ether1-gateway                                                                                                           
 2 D 192.168.20.2/32    192.168.20.1    AverAutoBirojs                                                                                                           
[user@192.168.2.1] > /ip route print 
Flags: X - disabled, A - active, D - dynamic, C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme, B - blackhole, U - unreachable, P - prohibit 
 #      DST-ADDRESS        PREF-SRC        GATEWAY            DISTANCE
 0 A S  0.0.0.0/0                          55.66.77.1              1
 1 ADC  55.66.77.0/24    55.66.77.18   ether1-gateway            0
 2 A S  192.168.1.0/24                     192.168.20.1              1
 3 ADC  192.168.2.0/24     192.168.2.1     bridge-local              0
 4   S  192.168.2.0/24                     192.168.20.1              1
 5 ADC  192.168.20.1/32    192.168.20.2    AverAutoBirojs            0